Re: Polarizers and other filters
I use a polarizer when needed - usually when I want a bluer shade of blue in the sky, make the clouds pop, or to cut back on reflections, like on tree leaves, water, shiny metal, etc. A polarizer in the bag can double as a 2 stop ND filter as well. That is the only filter I use on digital bodies, except for hte occasional UV or Skylight which is just there for protective purposes, and the very rare use of an IR filter for fooling around. The RGB channels in the digital color image, when desaturated, are what you would get with a red, green, blue filter ona mono sensor or film. You cna blend them to make any color you want. _ Mark On 6/9/2013 8:27 AM, Collin Brendemuehl wrote: I've been using a polarizer on my 18-55WR and am pleased with the results. I'm wondering how many others use filters (other than UV/1A) on their lenses? Also, if you do b&w with the DSLR, do you use your Yellow, Orange, and Red filters as with film? -- 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: Polarizers and other filters
On 10 June 2013 20:47, Bipin Gupta wrote: > Hi Collin & David, we normally do not use color filters when shooting > B&W on a DSLR. Reason: todays DSLRs have built in color filters, which > you can use very easily, rather than attaching a filter physically. > So also photo programs like Photoshop have a variety and strengths of > color filters. > But hey, why not have some fun with actual color filters if you have them?? > I use Circular Polarizers, Neutral Density & Graduated Neutral Density > Filters with my lenses. And a GND on my Sigma 10-20 SWA is an absolute > must as it covers a huge swath of sky. But using a Polarizer on this > lens can be tricky due to great variation in the sky darkening effect > - not uniformly darkened. > Since I am not a Pro, I have decent mid-cost Circular Polarizers - $ > 29 to 50, a Hoya Pro1 ND - $ 62 and Cheap Chinese ND & GND Filters - $ > 4 to 9. Polarizers and full ND filters are all I use with my DSLRs, I don't use ND grads for a similar reason that I don't use colour filters when shooting with intent to render a B&W image. I find the ND grads are far too inflexible and considering that the likelihood of me using one without employing a tripod is close to nil I simply shoot a bracket set then do a simple but effective mask to integrate two or more of the bracketed images, the resultant composite is generally excellent. -- Rob Studdert (Digital Image Studio) Tel: +61-418-166-870 UTC +10 Hours Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio -- 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: Polarizers and other filters
Hehe - join the group sent from your mobile device? ann On 6/9/2013 15:45, Paul Stenquist wrote: I sometimes proofread my e-mails. But obviously not this one! Paul via phone On Jun 9, 2013, at 2:12 PM, Paul Stenquist wrote: I sometime use a polarize. Most often when shooting cars to kill reflections. I also used one the other day when shooting an autonomous vehicle, so I could be certain of a view through the windshield. Sometimes use one to darken the sky for a pic but not often. I never use color filters for BW. There's no ned because in conversion the grey level of the various colors can be easily controlled. Paul On Jun 9, 2013, at 8:27 AM, Collin Brendemuehl wrote: I've been using a polarizer on my 18-55WR and am pleased with the results. I'm wondering how many others use filters (other than UV/1A) on their lenses? Also, if you do b&w with the DSLR, do you use your Yellow, Orange, and Red filters as with film? -- 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. -- 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. -- 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: Polarizers and other filters
On Sun, Jun 09, 2013 at 08:27:39AM -0400, Collin Brendemuehl wrote: > I've been using a polarizer on my 18-55WR and am pleased with the results. > I'm wondering how many others use filters (other than UV/1A) on their > lenses? I use polarizers moderately often, particularly when I want to bring out clouds or cut reflections. Sometimes, if I am shooting a scene with extremely wonky color balance, I'll use a filter to bring the different color channels into better alignment. For example, some bars will have their stage lights so far into the red, or maybe yellow, that you can't expose to get enough detail in the blue channel (or the blue and green channels) without totally blowing out the red channel. > > Also, if you do b&w with the DSLR, do you use your Yellow, Orange, and Red > filters as with film? > > > -- > 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. -- Larry Colen l...@red4est.com http://red4est.com/lrc -- 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: Polarizers and other filters
I sometimes proofread my e-mails. But obviously not this one! Paul via phone On Jun 9, 2013, at 2:12 PM, Paul Stenquist wrote: > I sometime use a polarize. Most often when shooting cars to kill reflections. > I also used one the other day when shooting an autonomous vehicle, so I could > be certain of a view through the windshield. Sometimes use one to darken the > sky for a pic but not often. I never use color filters for BW. There's no ned > because in conversion the grey level of the various colors can be easily > controlled. > > Paul > On Jun 9, 2013, at 8:27 AM, Collin Brendemuehl > wrote: > >> I've been using a polarizer on my 18-55WR and am pleased with the results. >> I'm wondering how many others use filters (other than UV/1A) on their >> lenses? >> >> Also, if you do b&w with the DSLR, do you use your Yellow, Orange, and Red >> filters as with film? >> >> >> -- >> 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. > > > -- > 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. -- 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: Polarizers and other filters
What Ken said.. - pretty much when I shot BW film I frequently used a yellow or orange filter, bit not street shooting. With color, I always used a polarizer - even if there were no trickly reflection problems the colors were improved - rotated to the most appealing degree of sparkle. ann On 6/9/2013 13:32, Kenneth Waller wrote: When conditions call for it I use a polarizer. Neat thing about digital is I don't need all the other color filters I used on slide film. -Original Message- From: Collin Brendemuehl Subject: Polarizers and other filters I've been using a polarizer on my 18-55WR and am pleased with the results. I'm wondering how many others use filters (other than UV/1A) on their lenses? Also, if you do b&w with the DSLR, do you use your Yellow, Orange, and Red filters as with -- 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: Polarizers and other filters
I sometime use a polarize. Most often when shooting cars to kill reflections. I also used one the other day when shooting an autonomous vehicle, so I could be certain of a view through the windshield. Sometimes use one to darken the sky for a pic but not often. I never use color filters for BW. There's no ned because in conversion the grey level of the various colors can be easily controlled. Paul On Jun 9, 2013, at 8:27 AM, Collin Brendemuehl wrote: > I've been using a polarizer on my 18-55WR and am pleased with the results. > I'm wondering how many others use filters (other than UV/1A) on their > lenses? > > Also, if you do b&w with the DSLR, do you use your Yellow, Orange, and Red > filters as with film? > > > -- > 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. -- 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: Polarizers and other filters
When conditions call for it I use a polarizer. Neat thing about digital is I don't need all the other color filters I used on slide film. -Original Message- >From: Collin Brendemuehl >Subject: Polarizers and other filters > >I've been using a polarizer on my 18-55WR and am pleased with the results. >I'm wondering how many others use filters (other than UV/1A) on their >lenses? > >Also, if you do b&w with the DSLR, do you use your Yellow, Orange, and Red >filters as with -- 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: Polarizers and other filters
I occasionally use a polarizer, when I remember to bring it. For waterfalls/slow water shots, I'll use an ND filter. Other than that, I don't use any filters. For B&W, all the modifications are done in post. On Sun, Jun 9, 2013 at 8:27 AM, Collin Brendemuehl wrote: > I've been using a polarizer on my 18-55WR and am pleased with the results. > I'm wondering how many others use filters (other than UV/1A) on their > lenses? > > Also, if you do b&w with the DSLR, do you use your Yellow, Orange, and Red > filters as with film? > > > -- > 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. -- David Parsons Photography http://www.davidparsonsphoto.com Aloha Photographer Photoblog http://alohaphotog.blogspot.com/ -- 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: Polarizers and other filters
I tend to us the polarizer during fall colour shoots. I have a ND fader filter i just bought but have not tried it yet Dave On Sun, Jun 9, 2013 at 8:27 AM, Collin Brendemuehl wrote: > I've been using a polarizer on my 18-55WR and am pleased with the results. > I'm wondering how many others use filters (other than UV/1A) on their > lenses? > > Also, if you do b&w with the DSLR, do you use your Yellow, Orange, and Red > filters as with film? > > > -- > 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. -- Documenting Life in Rural Ontario. www.caughtinmotion.com http://brooksinthecountry.blogspot.com/ York Region, Ontario, Canada -- 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: polarizers, take 2
> Yes ... if the polarizer has threads, if you're willing to buy a very > large (and likely expensive) lens hood, and if what you get provides > suitable coverage for the lens you're using it on. I've bought & used collapsible bubber lens hoods that have worked very well for me over the years,. I don't recall the prices but they weren't expensive IIRC. Kenneth Waller http://www.tinyurl.com/272u2f - Original Message - From: "Godfrey DiGiorgi" <[EMAIL PROTECTED]> Subject: Re: polarizers, take 2 > > On Jun 5, 2008, at 4:43 PM, Ken Waller wrote: > >> Am I missing something here... >> >> You could use a hood (sized to the polarizer) screwed into the filter. > > Yes ... if the polarizer has threads, if you're willing to buy a very > large (and likely expensive) lens hood, and if what you get provides > suitable coverage for the lens you're using it on. > > It's a much larger and clumsier thing than having a filter that fits > the lens with the hood you usually use. > > G -- 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: polarizers, take 2
On Jun 5, 2008, at 4:43 PM, Ken Waller wrote: > Am I missing something here... > > You could use a hood (sized to the polarizer) screwed into the filter. Yes ... if the polarizer has threads, if you're willing to buy a very large (and likely expensive) lens hood, and if what you get provides suitable coverage for the lens you're using it on. It's a much larger and clumsier thing than having a filter that fits the lens with the hood you usually use. G -- 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: polarizers, take 2
Scott, I've several polarizers. One is B+W 58mm that I bought brand new along with 49->58 and 52->58 rings. It was about $115 from B&H. It serves my limited lenses, 'cause 31 ltd does not allow anything but proper 58 mm filter. Another is Promaster MC Polarizer that I bought used from someone on the list (could be you as well) that I find absolutely satisfactory. I use it on Tamron 28-75 and SMCPJ 18-35. In fact, if anyone needs a simple 58 mm Cokin polarizer (I cannot say is it MC or not, it only says "mineral glass" on the box) - contact me off-list - I'll send it across. I also have Cokin-A system polarizer that I used prior to getting B+W's one. Admittedly, B+W is the best. However, others are not bad either. All these are circular polarizers. HTH. Boris Scott Loveless wrote: > So I'm shopping for a polarizer again... -- 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: polarizers, take 2
- Original Message - From: "Scott Loveless" Subject: polarizers, take 2 > Howdy! > > So I'm shopping for a polarizer again. A year or two ago I asked about > polarizers, but I can't find the thread. Anyway, I ended up with a > fairly inexpensive Sunpak 58mm polarizer from the LCS and a few step up > rings for the smaller lenses. Now the 645 needs one. The filter ring > sizes are 58, 67 and 77mm, and I'm leaning toward the same kind of set > up - one polarizer and step up rings. The camera budget is not going to > allow for a polarizer on each lens, a la Charles Braswell. As long as you are very carful about flare, especially veiling flare, you should be fine. > > IIRC, since this is a manual focus system I shouldn't need a circular > polarizer, though it certainly wouldn't hurt. Perhaps a few of you > could make some recommendations on brand, etc., before I buy one. B&H > has a Hoya linear polarizer for about $40US. But anything under $100 > should be fine. I don't know if the 645 uses a beam splitter in the exposure metering system or not. If it does, then consider a circular polarizer. If it doesn't, then a standard polarizer is fine. > > Thanks a bunch! > > BTW, the PUG should be up sometime today. Damn. Missed another one. William Robb -- 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: polarizers, take 2
Am I missing something here... You could use a hood (sized to the polarizer) screwed into the filter. Kenneth Waller http://www.tinyurl.com/272u2f - Original Message - From: "Scott Loveless" <[EMAIL PROTECTED]> Subject: Re: polarizers, take 2 > Godfrey DiGiorgi wrote: >> On Jun 5, 2008, at 8:32 AM, Scott Loveless wrote: >> >>> Godfrey DiGiorgi wrote: >>>> The biggest thing wrong with the step up plan you use is that lens >>>> hoods are problematic. You should never use a filter without a lens >>>> hood in order to minimize flare. Also, be sure to get multicoating >>> ... However, I've never found a hood to be >>> necessary with a polarizer. ... >> >> A polarizer is no less, and usually more, prone to flare than a >> single filter because it is a multi-part composite lens accessory. >> Veiling flare can be subtle to see because a polarizer typically >> improves scene contrast by reducing polarized components of specular >> reflections ... but I'm unwilling to sacrifice any contrast. ;-) >> > For me it's a matter of how I shoot. The polarizer gets put on the lens > when it will have the most dramatic effect. I can't ever recall using > one hand-held or with the sun being anywhere close to in the frame. > That said, when the camera's on a tripod it's easy enough to shade the > lens with a hand or hat or umbrella or whatever I have with me. > > -- > Scott Loveless > http://www.twosixteen.com/fivetoedsloth/ -- 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: polarizers, take 2
Godfrey DiGiorgi wrote: > On Jun 5, 2008, at 8:32 AM, Scott Loveless wrote: > >> Godfrey DiGiorgi wrote: >>> The biggest thing wrong with the step up plan you use is that lens >>> hoods are problematic. You should never use a filter without a lens >>> hood in order to minimize flare. Also, be sure to get multicoating >> ... However, I've never found a hood to be >> necessary with a polarizer. ... > > A polarizer is no less, and usually more, prone to flare than a > single filter because it is a multi-part composite lens accessory. > Veiling flare can be subtle to see because a polarizer typically > improves scene contrast by reducing polarized components of specular > reflections ... but I'm unwilling to sacrifice any contrast. ;-) > For me it's a matter of how I shoot. The polarizer gets put on the lens when it will have the most dramatic effect. I can't ever recall using one hand-held or with the sun being anywhere close to in the frame. That said, when the camera's on a tripod it's easy enough to shade the lens with a hand or hat or umbrella or whatever I have with me. -- Scott Loveless http://www.twosixteen.com/fivetoedsloth/ -- 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: polarizers, take 2
On Jun 5, 2008, at 8:32 AM, Scott Loveless wrote: > Godfrey DiGiorgi wrote: >> The biggest thing wrong with the step up plan you use is that lens >> hoods are problematic. You should never use a filter without a lens >> hood in order to minimize flare. Also, be sure to get multicoating > > ... However, I've never found a hood to be > necessary with a polarizer. ... A polarizer is no less, and usually more, prone to flare than a single filter because it is a multi-part composite lens accessory. Veiling flare can be subtle to see because a polarizer typically improves scene contrast by reducing polarized components of specular reflections ... but I'm unwilling to sacrifice any contrast. ;-) G -- 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: polarizers, take 2
Godfrey DiGiorgi wrote: > The biggest thing wrong with the step up plan you use is that lens > hoods are problematic. You should never use a filter without a lens > hood in order to minimize flare. Also, be sure to get multicoating Looks like the one I was considering isn't multi-coated, and I agree that it should have that. However, I've never found a hood to be necessary with a polarizer. The only other filters I use are red, green and yellow for black and white. I'll buy those to fit each lens. > The sensitivity to LP vs CP can affect both AF sensors and metering > sensors, depending upon how a particular camera is designed. The P645 > metering sensors read from the focusing screen, which scatters and > remixes the light unless I'm mistaken, so it's not sensitive to a > linear/circular polarizer, but I'd buy a CP anyway as future proof > for when you might get a camera that requires it. > > 77mm size is pretty expensive. I think the Panasonic "Lumix" 72mm I > bought was $115 or so from B&H. If you can't afford the B+W filters > (the best), take a look at the Hoya Pro-1 models. That 72mm polarizer > above is a re-branded Hoya Pro-1 and is beautifully finished, very > slim, and costs 30% less than the B+W. The coating is very good. It > also has filter threads on the front side so you can fit a lens hood. > Thanks, Godfrey. I'll take a look at those. -- Scott Loveless http://www.twosixteen.com/fivetoedsloth/ -- 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: polarizers, take 2
The biggest thing wrong with the step up plan you use is that lens hoods are problematic. You should never use a filter without a lens hood in order to minimize flare. Also, be sure to get multicoating The sensitivity to LP vs CP can affect both AF sensors and metering sensors, depending upon how a particular camera is designed. The P645 metering sensors read from the focusing screen, which scatters and remixes the light unless I'm mistaken, so it's not sensitive to a linear/circular polarizer, but I'd buy a CP anyway as future proof for when you might get a camera that requires it. 77mm size is pretty expensive. I think the Panasonic "Lumix" 72mm I bought was $115 or so from B&H. If you can't afford the B+W filters (the best), take a look at the Hoya Pro-1 models. That 72mm polarizer above is a re-branded Hoya Pro-1 and is beautifully finished, very slim, and costs 30% less than the B+W. The coating is very good. It also has filter threads on the front side so you can fit a lens hood. Godfrey On Jun 5, 2008, at 7:42 AM, Scott Loveless wrote: > Howdy! > > So I'm shopping for a polarizer again. A year or two ago I asked > about > polarizers, but I can't find the thread. Anyway, I ended up with a > fairly inexpensive Sunpak 58mm polarizer from the LCS and a few > step up > rings for the smaller lenses. Now the 645 needs one. The filter ring > sizes are 58, 67 and 77mm, and I'm leaning toward the same kind of set > up - one polarizer and step up rings. The camera budget is not > going to > allow for a polarizer on each lens, a la Charles Braswell. > > IIRC, since this is a manual focus system I shouldn't need a circular > polarizer, though it certainly wouldn't hurt. Perhaps a few of you > could make some recommendations on brand, etc., before I buy one. B&H > has a Hoya linear polarizer for about $40US. But anything under $100 > should be fine. > -- 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: Polarizers...
På 7. jan. 2004 kl. 22.56 skrev Tanya Mayer Photography: Just a question in regards to polarizers... Can someone explain to me the difference between a circular and linear polarizer? Could I use a linear polarizer on my Oly which has internal AF ie. the lens doesn't rotate? A circular polarizer is in principle a linear polarizer with a depolarizer on the back, first filtering out light with a certain polarization and then depolarizing the light coming through the filter. It works on all cameras, but is a bit more expensive. Most modern cameras, and I think all AF cameras, have beam splitters in their AF-system (as well as their light meters). These beam splitters are polarization dependent. Therefore, to get correct metering and AF the light coming into the camera should not be polarized. Try placing a linear polarizer in front of another and rotate them relative to each other, and you see what you AF sensors or light meters will see if you put a linear polarizer on a modern camera. You can get anything from almost all the light through the second filter to absolute darkness, if the polarizers are good. DagT
Re: Polarizers...
Tanya Mayer Photography wrote: > > Just a question in regards to polarizers... > > Can someone explain to me the difference between a circular and linear > polarizer? Could I use a linear polarizer on my Oly which has internal AF > ie. the lens doesn't rotate? > > TIA, > tan. Circular polarizers cost more. :) but seriously, read Robb's post - that explains it perfectly. If you have a circular one you don't have to think about which camera you are using - it works on all of 'em - but the linear supposedly might throw off your light readings, and hence exposure. annsan
Re: Polarizers on ultra-wde angle lenses Wa suggestion ultra-wide angle lens
On Tue, 30 Jan 2001 12:29:10 +0100, [EMAIL PROTECTED] wrote: >Also, don't forget that with the SOOO WIDE FOV, some parts of the sky will >be darkened more than other parts (you will be recieving both rays >polarised more and polarised less), so you will propably get a very strange >effect of both light & dark sky areas. Anybody tried it actually? Yes. The only way I'll ever use a polarizer (for shots that include a lot of sky, anyway) with my 20mm, or even my 24mm, is for vertically-formatted shots. - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
Re: Polarizers on ultra-wde angle lenses Wa suggestionultra-wide angle lens
canislupus wrote: that I had suggested: > > on polarizing wide angle lenses . > > So, I'd just look for a strong skylight filter to achieve > > the polarized color saturation effect w/ ultrawides. > Also, don't forget that with the SOOO WIDE FOV, some parts of the sky will > be darkened more than other parts (you will be recieving both rays > polarised more and polarised less), so you will propably get a very strange > effect of both light & dark sky areas. Yes, precisely why I suggest the strong skylight instead of a polarizer. As you mentio, the polarization effect will be variable relative to the wide range of incident light angles. > Anybody tried it actually? I am speculating again ;) But I seem > to remember reading someting about this effect. ;^) it's science, and physics to boot - a genuine fact ;^) I did discover that the skylight series do cause a very similar deepening of blue sky when used on axis w/ the incident light, whereas polarizers have maximum effect at a 90degree angle. Some of my deepest blue skies have come from this combo and my 24mm f3.5 SuperTak. I suspect that the FishEye Tak's UV is more accurately a skylight - the deepening (blue sky) it gives far surpasses any UV filter I (used to) use. ... still need polarizers if reflection cancellation is what you're after though. Read somewhere (and it also seems accurate) that ~30degrees angle to the subject works best. Then adjust the polarizer to cancel. Bill - Bill D. Casselberry ; Photography on the Oregon Coast http://www.orednet.org/~bcasselb [EMAIL PROTECTED] - - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
Re: Polarizers on ultra-wde angle lenses Wa suggestion ultra-wide angle lens
[EMAIL PROTECTED] wrote: > I think you may have misunderstood my post. I presume you are wanting a >center graduated polarizer, and AFAIK, they do not exist. What does exist for >some LF lenses are center spot graduated filters designed to even out the >exposure variance caused by light fall off with WA lenses. The easiest way to do this is with Adobe Photoshop or similar image editing software. I find it a little distasteful myself, although I must admit I can't come up with a rational reason why; I just prefer to be able to get it right on the original slide if possible. But when all else fails... - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
Re: Polarizers on ultra-wde angle lenses Wa suggestion ultra-wide angle lens
In a message dated 1/30/01 1:56:48 AM Eastern Standard Time, [EMAIL PROTECTED] writes: << I think you may have misunderstood my post. I presume you are wanting a center graduated polarizer, and AFAIK, they do not exist. What does exist for some LF lenses are center spot graduated filters designed to even out the exposure variance caused by light fall off with WA lenses. >> The wide-angle centerspot *was* what I thought I'd read as a complete line, including a polarizer. At that price, I don't want one. Mafud [EMAIL PROTECTED] [EMAIL PROTECTED] - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
Re: Polarizers on ultra-wde angle lenses Wa suggestion ultra-wide angle lens
on polarizing wide angle lenses . seems to me that at the optimal "90degrees to the sun" shooting angle and an ultrawide one would guarantee bad flare effects. My old 17mm f4 FishEyeTakumar has a built-in UV (but it seems much more like a strong skylight) which tends to achieve the same deepening & color enriching effect when shooting w/ the sun behind you, as I do most often with such wide angles of view. So, I'd just look for a strong skylight filter to achieve the polarized color saturation effect w/ ultrawides. Bill - Bill D. Casselberry ; Photography on the Oregon Coast http://www.orednet.org/~bcasselb [EMAIL PROTECTED] - - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
Re: Polarizers on ultra-wde angle lenses Wa suggestion ultra-wide angle lens
- Original Message - From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: January 30, 2001 12:32 AM Subject: Re: Polarizers on ultra-wde angle lenses Wa suggestion ultra-wide angle lens > In a message dated 1/30/01 12:32:46 AM Eastern Standard Time, > [EMAIL PROTECTED] writes: > > << I think one would have to use one of these in conjunction with a polarizer > filter. > William Robb >> > > What's the cost of the WA polarizer Vs "normal" circular polarizers of 77mm? > And who has (sells) them? I think you may have misunderstood my post. I presume you are wanting a center graduated polarizer, and AFAIK, they do not exist. What does exist for some LF lenses are center spot graduated filters designed to even out the exposure variance caused by light fall off with WA lenses. I am certain that they are lens specific filters, not one size fits all. They are hideously expensive, this I know for sure. Heliopan makes a 77mm center filter, I suspect this is an ND filter that is graduated from the center. B&H is asking US$319.95 for it as of the June 2000 Shutterbug advert. You might want to check with B&H, or else with Heliopan to see if it will even out the light fall off for the lens you are wanting to fit it to. Whether you would be able to mount a polarizer on top of it without vignetting or image degradation is anyones guess. Hope this helps William Robb > > Mafud - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
Re: Polarizers on ultra-wde angle lenses Wa suggestion ultra-wide angle lens
In a message dated 1/30/01 12:32:46 AM Eastern Standard Time, [EMAIL PROTECTED] writes: << I think one would have to use one of these in conjunction with a polarizer filter. William Robb >> What's the cost of the WA polarizer Vs "normal" circular polarizers of 77mm? And who has (sells) them? Mafud [EMAIL PROTECTED] [EMAIL PROTECTED] - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
Re: Polarizers on ultra-wde angle lenses Wa suggestion ultra-wide angle lens
<[EMAIL PROTECTED]> wrote: To: <[EMAIL PROTECTED]> Sent: Monday, January 29, 2001 8:47 PM Subject: Re: Polarizers on ultra-wde angle lenses Wa suggestion ultra-wide angle lens > In a message dated 1/29/01 10:33:36 PM Eastern Standard Time, > [EMAIL PROTECTED] writes: > > << The other issue is use of filters. Pentax comes with built-in yellow, > orange, skylight, and UV. Tamron and Sigma has a slot for gelatin filters. > The Ultra-wide Heliar (12mm) has an optional 77mm filter adapter. In > practical terms that means > that only Ultra-wide Heliar will allow you to use a polarizer (but it's > still a pain). >> > > Someone makes a "wide angle" Polarizer, a filter that is evenly dark in the > center then lightens at the edge (like a gradient filter) to compensate for > light fall-off? The problem with using a polarizer on Ultra-Wide Heliar is that it's a rangefinder lens. You can't see the effect of the polarizer as you rotate it. Leica and Mamiya make special polarizers for their cameras that can be swung out to show in the viewfinder. Leica comes with adapters for 39mm and 46mm and Mamiya should work with 58mm and 67mm. Not really helpful with 77mm filter thread. The only way to make this work is to mark the side of the filter so that you can view the effect through the filter and try to position the filter in the same way when mounted on the lens. If there is a polarizer as you described, it may be useful here. - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
Re: Polarizers on ultra-wde angle lenses Wa suggestion ultra-wide angle lens
In a message dated 1/29/01 10:33:36 PM Eastern Standard Time, [EMAIL PROTECTED] writes: << The other issue is use of filters. Pentax comes with built-in yellow, orange, skylight, and UV. Tamron and Sigma has a slot for gelatin filters. The Ultra-wide Heliar (12mm) has an optional 77mm filter adapter. In practical terms that means that only Ultra-wide Heliar will allow you to use a polarizer (but it's still a pain). >> Someone makes a "wide angle" Polarizer, a filter that is evenly dark in the center then lightens at the edge (like a gradient filter) to compensate for light fall-off? Mafud [EMAIL PROTECTED] [EMAIL PROTECTED] - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
