Re: 78 rules of photography
On Sat, Jul 04, 2009 at 01:50:53AM +0200, tim...@clancode.hu wrote: http://gawno.com/2009/05/78-photography-rules/ No. 15 is s me :) #77 is half the pictures that make it into PPG -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Pentax listens to the little things
On Sun, May 03, 2009 at 08:40:59PM -0400, Matthew Miller wrote: I often take photographs in my girls' room, which has big green fabric leaves from Ikea near the ceiling. Bounce flash works great in there, but everything, not surprisingly, ends up with a green tint. Now, I can -- and do -- set the white balance perfectly with a gray card. But since the lighting there is always the same, what I'd _like_ to do is transfer that setting to one of the three custom white balance settings available. Hah! K-7 manual, page 198: You can copy the white balance setting of a captured image and save it as Manual White Balance. Now, I don't want to claim personal credit for this idea, because surely I'm not the first to have it. But as with the K10D to K20D, it's awesome that a lot of these small improvements which seem to address individual complaints are indeed there. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Exploring Boston: Bromfield Camera
On Wed, Jul 01, 2009 at 06:06:17PM -0400, John Graves wrote: Welcome to Boston. There is another camera dealer in Melrose, a suburb of Boston. They used to be Hunt Drug, but now are Hunt Photo Video. They sell most of the major brands but not much of Pentax, unfortunately. They have several branch stores including Boston at 520 Commonwealth Drive. Commonwealth Drive is worth the walk or drive anyway. A very 1920's kind of promenade. The Hunt's in Harvard Square tends to have more Pentax stuff than the Kenmore Square (Comm Ave) one. Although neither are very exciting in that way. There's also Cameras Inc, which is based in Arlington (never visited that location) and has a store in Davis Square. They had Pentax until a year and a half ago -- I'm pretty sure they've dropped it now. And of course there's Calumet out by the Galleria Mall (Lechemere); a bigger chain. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax Users Gallery
On Fri, Jun 05, 2009 at 08:17:27PM -0400, Graydon wrote: Here they are, what do you think ? Thanks Joe http://photo.net/photodb/photo?photo_id=9296930 Really splendid photo but it's violent (at least implicatively) so the PUG won't generally take it. Took me a while to figure out where the implicit violence was in the banjo scene. :) -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Ricehigh is at it again
On Wed, May 27, 2009 at 09:20:57PM +1000, Anthony Farr wrote: OTOH it's an interesting method of market research. Just fly a few extravagent kites and see how much interest they arouse. If the rumoured products are unpopular then the company merely disclaims them. Yeah, although based on the forum posts, I think there's a lot of people who want the f/1.0 lens because IN YOUR FACE CANON AND NIKON LOOOK AT HOW AWESOMES PENTAX IS OUR CAMERA BRAND RULZE111! And not because they'd actually spend the money to buy one. As you point out, that might not be a horrible strategy after all -- as long as Pentax is basically using it for advertising and sets their sales figures appropriately. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Confirmed: no K30D ever. The K-7 *is* the K30D.
http://www.pentaxforums.com/forums/pentax-dslr-discussion/61649-there-will-no-k30.html The original name for the K-7 was the K30. However, as developement rolled on, we realized that this camera was much more than a replacement to the K20D. Therefore, we decided to move to a different number. As far as where that number came from, it is hard to say. I probably shouldn't share this, but the original suggestion was K-9. For obvious reasons we here in the US and our European counterparts vetoed this idea. Says John Carlson, Pentax Product Managerfor Imaging Systems. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Ricehigh is at it again
On Tue, May 26, 2009 at 11:07:52PM -0400, Graydon wrote: OR, someone in the Graphic Arts department PhotoShopped a copy of the 'real' Lens Map to screw with (and bring out) the culprit who has been leaking stuff within Pentax's fold. That'd be my bet. While that is certainly not impossible, the marketing department is not likely to be happy at the prospect of having to explain they were only joking, no one could possibly have believed that, what do you mean you want one, about some if not all of those lenses. So I don't think it's obvious that it's fake. Why would it have to be Pentax's graphics department? Anyone could do it. *I* could do it. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Oh another K-7 thread...
On Fri, May 22, 2009 at 07:49:36AM -0400, paul stenquist wrote: Because you get only partial flash output, the catchlights and the illumination are minimal with artificial high-speed synch. Non-existent in bright light at a distance of more than five or six feet. I use it all the time, but it's a poor substitute for the real thing. To put some numbers on it: the Metz 48 AF-1 has a GN of 35 at 50mm-e @ ISO 100, but in HSS mode, only 15. That means about 80% of the power is lost. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: K-7 shutter/mirror noise, SD card storage in grip, compresed DNG
On Fri, May 22, 2009 at 07:20:42AM +0300, Boris Liberman wrote: 1. The camera sensor seems to be totally new. They have played with the micro lenses to increase actual area of a single pixel. The reviewer also mentions that this new micro lens design makes it work better with film lenses and it allows for wider range of angles of falling light. I'm having deja vu here: http://www.pentax.jp/english/imaging/digital/slr/k20d/feature.html -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: CA correction on the K-7
On Wed, May 20, 2009 at 11:57:37PM -0400, John Francis wrote: Apparently (from posts on the DPReview forum) this takes *several seconds* per exposure. Sounds hard to believe, but if this is true I guess it's not all that useful. Yeah, seriously. Although the in-camera raw conversion can still do it. If the feature turns out to be debilitating 3-4 seconds downtime after I click would definitely cause me to miss shots. On the other hand, maybe I can learn turn it on sometimes simply to force myself to be more deliberate in my shooting. :) -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: CA correction on the K-7
On Wed, May 20, 2009 at 09:36:29PM -0700, Joseph McAllister wrote: I would guess that CA reduction and perspective correction could / would be done post capture, but prior to offloading the card. After all, all the information about the taking lens is there in the metadata. It's just a software routine with sub-routines for each lens model that it can cover. It can be done in the in-camera RAW converter, which is probably where I'll use it most often. It would be nice if over time Pentax did run through the older lenses CA / Distortion to update the firmware for A*, F*, FA*, then A, F, and FA. And so forth. And a way to tell the camera a bit more than the focal length. If So, apparently, there's no lens data in the firmware -- it's all communicated by the lens. And that communication started with the DA series, even though there weren't yet bodies with the ability do do something with the data. (So says JohnCPentax on the dpreview forums.) not in camera, then perhaps the Pentax software in computer could create a file from the corrections you would make to an images or three from one of these older lenses to correct for CA Distortion, which could then be loaded into the sub-routine cue of the camera's firmware. Sure -- there's software to do this already. Noteably DxO, but in the open source world, there's Fulla. http://wiki.panotools.org/Fulla -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: K-7 size compared to competitors.
On Thu, May 21, 2009 at 11:14:43AM +0200, Thibouille wrote: Even though I do not like Ricewhine, his blog shows a picture of great interest IMO. It shows K-7 compared to a couple competitors cameras. Difference is quite stunning IMO. He's just reposting from here: http://www.flickr.com/photos/sveinmb/3543097453 -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Oh another K-7 thread...
On Thu, May 21, 2009 at 08:54:29PM -0400, paul stenquist wrote: The difference between 1/180th and 1/250th flash synch is substantial when shooting a brightly backlit subject in bright daylight. A lot can happen in 0.0016 seconds. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Oh another K-7 thread...
On Thu, May 21, 2009 at 07:10:28PM -0600, William Robb wrote: The difference between 1/180th and 1/250th flash synch is substantial when shooting a brightly backlit subject in bright daylight. A lot can happen in 0.0016 seconds. C'est what? For example, someone walking by at a brisk pace of 4mph will move an additional tenth of an inch. With a 1/250th sync, you could have caught them moving only 0.3 inches, but n, with Pentax's horrible 1/180th, we're stuck with a whole 0.4 inches of movement. Of course, with hummingbirds, it's even worse. Why, at 1/180th, the hummingbird's wings have gone through a whole 38% of a stroke. With 1/250th, that'd be reduced to a mere 28%. Okay, seriously -- the time difference just doesn't seem that much. (1/643 of a second *different*.) Neither does half a stop. I accept that there's some narrow cases where it'd help, but I can't see it as the huge deal that it seems to be to some folks. What am I missing? -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Oh another K-7 thread...
On Thu, May 21, 2009 at 11:09:00PM -0400, Paul Stenquist wrote: You're missing the fact that the amount of flash exposure you can work into a shot is dependent only on the f stop. So if I shoot a backlit portrait outdoors at f5.6, 1.250th, I can fill flash in at that 5.6 value. If I'm forced to stop down to f6.7 because I can't go beyond 1/180th in shutter speed, I lose flash exposure and increase DOF. But again, *half* a stop. Assuming the FA 77mm at 10 feet, the depth of field is going from about 13 to 15. (Right? Up past my bedtime, so feel free to check my math.) Two (and a half, actually -- rounding) inches isn't nothing, but it's still only two inches. Ideally, I'd like to have flash synch up to 1/1000th, but that's complex and cost;y. Right, I understand that going from 0.0056s to 0.0010s would be useful. That's two and a half stops better, and in the example above, you're shooting at f/2.8 and have more than halved your DOF, down to about 6. And high-speed synch doesn't help much, because the flash power is greatly diminished by multiple firings. So, improved noise performance should help just as well, right? I wouldn't be surprised at all if the sensor refinements gain you your half stop back right there. Optimistically, more. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax K7
On Wed, May 20, 2009 at 07:55:00PM -0400, Ken Waller wrote: I'm very happy with my K20D (K10D in reserve) and just don't see enough in the K7 to get one. I said the same about the K20D when it came out but some high ISO shots by Paul S. pushed me over the edge. In the OK1000 preview (from the blog at http://www.ok1000pentax.com/2009/05/pentax-k-7-hands-on-preview.html), Pentax Product Manager Chris Pound is quoted as saying: We think this will really appeal to K10D or *ist users, classic users, advanced amateurs or budget pros. Sounds like they're not aiming to get K20D users to convert en masse. They're going for new users plus owners of older Pentax models who hadn't seen a compelling reason to go for the K20D. (That'd be me, for example, although I was tempted by the higher ISO as well.) -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax K7
On Wed, May 20, 2009 at 10:50:30PM -0400, paul stenquist wrote: Sounds like they're not aiming to get K20D users to convert en masse. They're going for new users plus owners of older Pentax models who hadn't seen a compelling reason to go for the K20D. (That'd be me, for example, although I was tempted by the higher ISO as well.) That kind of thinking leads me to believe we may still see a higher spec K30D later this year. The K7 is nice, but it isn't the game changer that some were predicting a few weeks ago. Nah, I just think they're being realistic about whether they can sell a new camera to every user every year. I'll be very surprised if the new camera later this year isn't aimed to replace the K200D. I think they're going to _try_ to keep the K-7 priced above $1000, so there's room between it and the $500 K2000. The game changer speculations have been wishful thinking for a long, long time. I don't think the economics of it lend any support to the idea, though. Although it's worth noting that Adorama actually literally says this: The Pentax K-7 is a game changer. http://www.adorama.com/alc/blogarticle/11608 :) -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: New K body coming... official !
On Wed, May 13, 2009 at 05:39:09PM -0400, paul stenquist wrote: I think I prefer the size of the k20/k10. Aside from my Leica, I've always worked with big cameras, and I'm comfortable with that. Now, someone said a new K30D is coming later this year. I wonder if it will be spec'ed as well So say some rumors. I think it's more likely that we'll see a K-[somerandomletter] aimed at replacing the K200D and fit between the K-7 and K-m. (Probably essentially a K20D crammed in a K-m-like body.) -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: People Scanning Our Prints
On Wed, May 13, 2009 at 11:51:54PM -0500, Christine Aguila wrote: I gave a nice print--as a gift--to a friend. My friend's father-in-law took the print to get it framed, and come to find out, he also made some scans of the print and gave them to family members. I'm just going to come out and say it--I'm really irked by this. I often sign my prints in the lower right hand edge, but I didn't on this print. I think most likely the offense hasn't even occured to them. It's just a nice thing that they own -- not something that has meaning to you as the original artist. I think the approach to take is to explain nicely that that's not cool. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: New K body coming... official !
On Wed, May 13, 2009 at 11:49:57AM +0200, Frits Wüthrich wrote: I read on the Dutch Pentax web site http://www.pentax.nl/nl/photo/news/71/ there is a new X70 camera, combining a SLR with teh comfort of a compactcamera (point and shoot) and the functions of a video camera. The X in X70 stands for crossover. Think this one isn't very exciting. It's a small-sensor super-zoom PS camera that I don't think Pentax even designed themselves -- it's suspiciously like the Nikon Coolpix P90. I think both companies said we need to hit this market niche and contracted out someone to make something to put their name on. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Wedding Photographer
On Wed, May 13, 2009 at 07:21:47AM -0400, Christian wrote: http://lynchburg.craigslist.org/bfs/1126049517.html Wow, that's priceless. The I own a camera therefore I can take photos like the pros, who charge alot more line reveals it as definitely a fake, but it's still funny. I think my favorite is I add glow and selective color to all of my images, giving them the best look possible. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: [k10d] replicating custom white balance in kelvin + offsets?
On Sun, May 10, 2009 at 10:01:02PM -0400, paul stenquist wrote: Well, sure. But I don't want the data for the sake of the data. I want it so I can enter it into the other wb setting on the camera. To what end? To save the setting? I've found that unless the light source is controlled, color temperature is unique to a specific time and place. Enough specific places that I happen to be in (like the example given in my first post) have similar-enough lighting that it would be helpful. I understand that no one actually has a helpful answer to my question, but that doesn't mean that there *shouldn't* be one. Pentax customer support USA couldn't help me either -- presumably only some engineers in Pentax Japan know the answer. It irritates me that information like this isn't just in the manual. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: [k10d] replicating custom white balance in kelvin + offsets?
On Tue, May 12, 2009 at 07:34:28AM +0800, David Savage wrote: I understand that no one actually has a helpful answer to my question Mark! :) thanks. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: [k10d] replicating custom white balance in kelvin + offsets?
On Sat, May 09, 2009 at 09:06:26PM -0400, paul stenquist wrote: When I have to do a custom white balance, which of course is only when shooting jpegs, I just use the grey card or a white card for that matter. If I don't like the results, I use the -3 +3 adjustments. It doesn't really mater what the Kelvin temp might be if the shots look good. The only time I shoot jpegs is for virtual tours. But many of these involve complex lighting: windows, tungsten, sometimes even some fluorescent. But the data is irrelevant. Only the results matter. Well, sure. But I don't want the data for the sake of the data. I want it so I can enter it into the other wb setting on the camera. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: [k10d] replicating custom white balance in kelvin + offsets?
On Fri, May 08, 2009 at 10:14:51AM -0400, Doug Brewer wrote: G-M means Green - Magenta. The other one is Blue - Amber. When you set manual white balance, you choose a Kelvin value, and then can set both of these two axes between -3 and +3. (The same adjustment grid that you use to tweak the pre-set white balance.) The question is: -3 to +3 *what*? now, see, I had considered that this might have been the case, then tried to over-complicate it. :) I guess the way to figure -3 to +3 what? would be to establish the zero point (what is the Kelvin value of zero in this instance?) then look to see what the Kelvin values are at +1, -1, etc, and the interval would establish what they (Pentax) consider the units. Make sense? Yeah, it makes sense, but for two things. First, the kelvin value displayed doesn't actually change -- the G-M/B-A grid is over to the right of that value and appears completely independent. And that's the second thing: the Kelvin scale measures along a blue-red axis. The green-magenta axis isn't related to that, so it makes sense that the Kelvin values aren't changed by it. But the blue-amber axis, by virtue of including blue, seems like it must have a complicated relationship with the Kelvin number. And I guess that's the third thing: it's hard to measure the actual impact of changes here. I suppose the test is to shoot a gray card with the custom white balance set to the card itself, and then see what divergence I get by changing the scale on *that* screen around. But even then, that's only part of the puzzle, and it seems like it should be the *harder* part, when I haven't even solved the easier part. Namely, once one has set the white balance with the gray card, there's no way to get a display of what Kelvin value that represents -- let alone the other offsets. I could buy an expensive color meter, of course, but that seems really weird to have to do when the camera clearly has one _built in_. Why can't it just display its readings? -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: [k10d] replicating custom white balance in kelvin + offsets?
On Wed, May 06, 2009 at 10:10:55PM -0400, Doug Brewer wrote: oh, sorry Matthew. I was looking into this and got distracted when I found out my job had been eliminated. Sorry to hear -- and sheesh, no worries: keep your priorities straight! GM, near as I was able to guess, means gamma, and I was looking, but not really grasping as yet, the units per. G-M means Green - Magenta. The other one is Blue - Amber. When you set manual white balance, you choose a Kelvin value, and then can set both of these two axes between -3 and +3. (The same adjustment grid that you use to tweak the pre-set white balance.) The question is: -3 to +3 *what*? -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: [k10d] replicating custom white balance in kelvin + offsets?
On Thu, May 07, 2009 at 12:17:38AM -0700, Rick Womer wrote: You can assign any combination of settings (including white balance) to the User spot on the top dial. See page 167 of the manual. That won't let you store a bunch of WBs, though; only one. Yeah, actually what I've got now is the custom WB in USER mode set to match this particular problematic room. But I'd really like the general solution -- particularly because without it, what could be a very useful feature (the three saved K settings) is basically just decoration. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: [k10d] replicating custom white balance in kelvin + offsets?
On Tue, May 05, 2009 at 12:42:04AM -0400, Matthew Miller wrote: which camera we talking about here? Um, K10D. I can't believe I left that out in such a long message. But, as far as I know, this information is a complete mystery for any Pentax dSLR. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: [k10d] replicating custom white balance in kelvin + offsets?
On Sun, May 03, 2009 at 08:48:48PM -0400, Doug Brewer wrote: Matthew Miller wrote: I often take photographs in my girls' room, which has big green fabric leaves from Ikea near the ceiling. Bounce flash works great in there, but everything, not surprisingly, ends up with a green tint. Now, I can -- and do -- set the white balance perfectly with a gray card. But since the lighting there is always the same, what I'd _like_ to do is transfer that setting to one of the three custom white balance settings available. Unfortunately, there's no way in-camera to read what the snapped white balance is (is there)? There's some possible information in the extended EXIF info, but I'm not sure exactly how to interpret it. On the other side, the G-M axis and B-A axis settings in-camera are without units -- who knows what 1 step of GM compensation means? I mean, literally, who knows? :) Since the LCD isn't color calibrated (and unlike the K20D isn't even adjustable), it's hard to tell exactly what changes there are going to do. I never seem to be able to really get 'em right dialing them in. My Olympus PS camera had a feature where one could store three (or was it four? -- I forget) different shutter-set custom WB settings. That was infinitely more useful to me than the custom K settings -- even if I had expensive lighting with documented output, a gray card reading would probably be more accurate anyway. (And yeah, I know that shooting in RAW would relocate the problem to my computer where I could address the issue in various ways. But I should be able to do this in camera, shouldn't I? Thanks in advance.) which camera we talking about here? Um, K10D. I can't believe I left that out in such a long message. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
replicating custom white balance in kelvin + offsets?
I often take photographs in my girls' room, which has big green fabric leaves from Ikea near the ceiling. Bounce flash works great in there, but everything, not surprisingly, ends up with a green tint. Now, I can -- and do -- set the white balance perfectly with a gray card. But since the lighting there is always the same, what I'd _like_ to do is transfer that setting to one of the three custom white balance settings available. Unfortunately, there's no way in-camera to read what the snapped white balance is (is there)? There's some possible information in the extended EXIF info, but I'm not sure exactly how to interpret it. On the other side, the G-M axis and B-A axis settings in-camera are without units -- who knows what 1 step of GM compensation means? I mean, literally, who knows? :) Since the LCD isn't color calibrated (and unlike the K20D isn't even adjustable), it's hard to tell exactly what changes there are going to do. I never seem to be able to really get 'em right dialing them in. My Olympus PS camera had a feature where one could store three (or was it four? -- I forget) different shutter-set custom WB settings. That was infinitely more useful to me than the custom K settings -- even if I had expensive lighting with documented output, a gray card reading would probably be more accurate anyway. (And yeah, I know that shooting in RAW would relocate the problem to my computer where I could address the issue in various ways. But I should be able to do this in camera, shouldn't I? Thanks in advance.) -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: formatting cards between every use
On Thu, Apr 23, 2009 at 09:02:13AM -0700, Larry Colen wrote: mkdir $1 date ls /media/disk/dcim/*/* |wc mv /media/disk/dcim/*/* $1 date I'm a little paranoid -- I mount the filesystem read-only, and I use rsync to transfer, because it verifies file checksums after transferring, which means no loss due to USB glitch or whatnot. Then after my files are transferred and also backed up to another fileserver, I reformat the card. I think Linux's FAT mkfs is pretty safe, but I usually do it in-camera just 'cause. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: formatting cards between every use
On Thu, Apr 23, 2009 at 05:55:30AM -0700, Godfrey DiGiorgi wrote: I've done this with every flash media I've owned since the beginning. Memory Stick, Memory Stick PRO, CF, SD, SDHC, xD ... all of them. No difference at all. I've *definitely* seen glitches in xD with my wife's Fujifilm F31fd. Unlike SD, all of the smarts have to be in the controller, and I think there's a lot more room for errors. Removing card while the filesystem is mounted can destroy data -- even if you haven't written anything. So in that case, I think the paranoia is justified. But fortunately, not relevant to Pentax. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: formatting cards between every use
On Thu, Apr 23, 2009 at 09:12:25PM +0100, Bob W wrote: I should think the difference is fairly minimal. To delete all, the system probably just sets a 'deleted' status for each file entry in the FAT, whereas to format the card I expect it simply writes a new FAT. In either case I'd be surprised if there was any great difference in the number of I/Os. On my K10D, it's significantly slower to delete-all. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: formatting cards between every use
On Sun, Apr 26, 2009 at 12:13:02PM -0400, Graydon wrote: I'm a little paranoid -- I mount the filesystem read-only, and I use rsync to transfer, because it verifies file checksums after transferring, which means no loss due to USB glitch or whatnot. Then That's a *lot* paranoid, unless you're using a 2.0 kernel or something. The USB transfer glitches are detected and fixed in the SCSI emulation of the USB-managing kernel code; despite the inevitable urk! from USB in a multi-gigabyte file transfer, you'll get the whole thing with a regular copy command. Fair enough. Still, the cost of the extra check is pretty low, so might as well. :) -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Website revisions
On Sun, Apr 26, 2009 at 09:57:47AM -0500, Nick Wright wrote: So I've made a few changes to my website. Some things I wanted to do, some things you all suggested. I'd love to hear what you all have to say about it. Thanks! http://www.nickdavidwright.com/ The first image loads really slowly -- oohh, 636K. I'm on broadband, but not the fastest. Someone on a slower link is going to have to _really_ want to see your site. (Plus, that'll cost you if the site ever does get insanely popular.) You could make it a very, very high quality JPEG at 400K, or a still quite good one for around 150K. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: formatting cards between every use
On Sun, Apr 26, 2009 at 11:51:42AM -0700, Godfrey DiGiorgi wrote: As far as I'm aware, SD does not include an in-card controller either. Only CF does. *shrug* http://en.wikipedia.org/wiki/Comparison_of_memory_cards#Technical_details Removing a card while a write is in progress will cause problems in every flash memory card system I've used, no matter whether it's any particular card format. Yeah, but with xD, it'll happen sometimes even if you're not writing. Try it, although not when you have anything valuable on there. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Website revisions
On Sun, Apr 26, 2009 at 03:49:22PM -0500, Nick Wright wrote: Turns out however my editor makes the drops shadows made it that big. Turn off the drop shadow function the size goes down to about 150k. I'll miss the drop shadows ... but not that much. Does it load any better for you all now? Yes, much. The reason is: in order to do the shadow, it was using the transparency (alpha channel) feature of the PNG file format. PNG is lossless compression, which of course will never be as efficient as lossy compression like JPG -- which doesn't support transparency. There'd be other ways to make drop shadows, as separate images (ideally with CSS tricks). -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: OT: New web site, give me your thoughts
On Wed, Apr 22, 2009 at 06:42:01AM -0500, Nick Wright wrote: I designed for 1280 pix wide. I have a screen with considerably more horizontal pixels than that, but I don't maximize my browser window. This is partly because I have a lot of things going on, but also because unadorned paragraphs of text become impossible to read if they're stretched out so long. (There's a reason newspaper columns are so narrow, after all.) I think aiming for around 1000 is still the best approach. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: DA 15/4 Limited, ETA, price?
On Thu, Mar 26, 2009 at 09:03:20AM +, John Whittingham wrote: Anyone got any info on the arrival of the DA 15mm Limited or a price. I've been looking forward to a wide angle lens to replace the 24mm that I used on film, something small, light and with a sensible filter size, it would fit nicely into my prime lens kit. I used a Sigma 24/2.8 for years and really miss having the equivalent FOV of that lens on digital. The official annoucement says shipping in April for $649.95. -- Matthew Miller mat...@mattdm.org http://mattdm.org/ The Definitive Pentax P-TTL Flash Model Guide: http://pttl.mattdm.org/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
