Re: New Japan rumors: 24MP K-3 in April, 645Dii in June
From what I've read about new Nikon camera (D7100, isn't it?), its sensor is made by Toshiba and not Sony. In fact, although probably convenient to Pentax, this arrangement with 1/2 year delay between OEM introduction and availability to Pentax is probably doing Pentax serious harm on the marketplace. It is because, in my personal view. it makes Pentax appear "me-too" and way after the surprise/novelty factor of fresh sensor introduced to the market place subsides... Just my two cents. On 2/21/2013 10:30 PM, Darren Addy wrote: This is apparently from the March issue of Nippon magazine (pg 179) Google translation of discussion thread. http://translate.google.com/translate?twu=1?sl=ja&tl=en&u=http%3A//s.kakaku.com/bbs/K416049/SortID%3D15794099/ or http://goo.gl/No5uD The translation is hard enough to read. But the K-3 introduction in April would be in line with what was rumored earlier, that Sony needed 6 months lead time in the market for the 24MP sensor that Pentax will be getting more out of than Sony did. : ) -- 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 Japan rumors: 24MP K-3 in April, 645Dii in June
On 2/22/2013 2:04 AM, Bruce Walker wrote: This all brings to mind the often-quoted: The difference between theory and practice is greater in practice than in theory. I've pixel-peeped all the K-5IIs hi-rez images I could find, compared them to the same scene shot on fully-AA'ed machines where available and have come to the conclusion that the K-5IIs is entirely made of win. For my purposes shots from the K-5IIs exceed the useful resolution of the Canon 5d Mk II, a standard in the portrait and fashion shooting biz. Moire was also a non-issue. I expect the K-3 (?) 24 Mpx body to have much additional win poured into it. Martin Dopplebauer's painfully twisted knickers notwithstanding. Bruce, K-5IIs is made of win unless you have K-5. Then it is made of "dear customer, give me your money just because I'm Pentax". I much rather Pentax invented in making an image processing engine similar to that in my 50mm Ricoh GXR module... I will be posting PESOs soon to illustrate my point... Boris -- 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 Japan rumors: 24MP K-3 in April, 645Dii in June
Here's an apples-to-apples comparison of a star test pattern from the D800/D800E: http://www.luminous-landscape.com/forum/index.php?topic=65927.msg523744#msg523744 Keep in mind that these are unsharpened. -- 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 Japan rumors: 24MP K-3 in April, 645Dii in June
On Fri, Feb 22, 2013 at 7:37 AM, Matthew Hunt wrote: > I wish he had provided raw files for the tree scene, and preferably > files from "twin" cameras (D800/D800E or K-5 II/IIs) > (I found it odd, for example, that the red and cyan patches were so > large, in terms of the number of pixels, given the non-periodic > structure of the branches.) It's worse than the cameras just not being twins: the Fuji X-E1 doesn't have a traditional Bayer filter pattern (which may be related to the large false color patches). So I agree that it could have been done better, and that the tone is a bit over the top. But I thought it was a useful piece because it makes the point that the extra detail that you get without an AA filter doesn't come for free; even if there is no visible moire there is still aliasing. I haven't seen that point made elsewhere on the photo interwebs. In this test target image, there is lots of extra "detail" inside the region of obvious color artifacts, but this detail is clearly not real. http://www.martin-doppelbauer.de/foto/tippstricks/aliasfilter/files/stacks_image_5430.png We know what the test target looks like, and the lines are not curved as they appear here. This sort of thing will be a general feature of aliased sampling, though the details may change depending on, well, the details. If one wants to make this tradeoff, that's fine with me. Personally, I dislike image artifacts more than I desire increased detail, so I would prefer not to see the industry go toward cameras without AA filters being the default as with the D7100. -- 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 Japan rumors: 24MP K-3 in April, 645Dii in June
On Fri, Feb 22, 2013 at 1:47 AM, Rob Studdert wrote: > On 22 February 2013 10:58, Darren Addy wrote: > >> I shared that link 8 days ago in the "Last call for K-5" thread, but >> it elicited no comments, which surprised me, a bit. > > I saw the link when it was first posted, I think it's a somewhat > exaggerated result, I guess others thought so too. I wish he had provided raw files for the tree scene, and preferably files from "twin" cameras (D800/D800E or K-5 II/IIs). In the early days of digital cameras, the demosaicing algorithms were prone to creating false detail(false color, maze artifacts, etc.) even in cameras with AA filters. They have improved considerably over the years. I suspect the algorithms may need another round of tweaking to behave better with non-AA cameras, and some may already do better than others. It would be nice to be able to compare different software. (I found it odd, for example, that the red and cyan patches were so large, in terms of the number of pixels, given the non-periodic structure of the branches.) -- 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 Japan rumors: 24MP K-3 in April, 645Dii in June
On 22 February 2013 10:58, Darren Addy wrote: > I shared that link 8 days ago in the "Last call for K-5" thread, but > it elicited no comments, which surprised me, a bit. I saw the link when it was first posted, I think it's a somewhat exaggerated result, I guess others thought so too. -- 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: New Japan rumors: 24MP K-3 in April, 645Dii in June
On Thu, Feb 21, 2013 at 6:58 PM, Darren Addy wrote: > On Thu, Feb 21, 2013 at 5:45 PM, Bryan Jacoby wrote: >> Nothing in here will be news to you, but I found this recently (via >> PetaPixel) and thought it was pretty good (though admittedly it >> approaches from the "all artifacts are bad even if you can't see them" >> point of view): >> http://www.martin-doppelbauer.de/foto/tippstricks/aliasfilter/index.html > > I shared that link 8 days ago in the "Last call for K-5" thread, but > it elicited no comments, which surprised me, a bit. My comment, had I shared it, was to have been, "Phxzzzt!" But it wasn't very scientific nor derived from heavy maths, so I held my tongue. -- -bmw -- 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 Japan rumors: 24MP K-3 in April, 645Dii in June
This all brings to mind the often-quoted: The difference between theory and practice is greater in practice than in theory. I've pixel-peeped all the K-5IIs hi-rez images I could find, compared them to the same scene shot on fully-AA'ed machines where available and have come to the conclusion that the K-5IIs is entirely made of win. For my purposes shots from the K-5IIs exceed the useful resolution of the Canon 5d Mk II, a standard in the portrait and fashion shooting biz. Moire was also a non-issue. I expect the K-3 (?) 24 Mpx body to have much additional win poured into it. Martin Dopplebauer's painfully twisted knickers notwithstanding. On Thu, Feb 21, 2013 at 6:45 PM, Bryan Jacoby wrote: > I think we're thinking about slightly different things. I agree with > what you say about visible moire, but I'm also thinking about > non-moire aliasing artifacts. These still represent (in my mind at > least) a corruption of the image, but they are not easily visible in > the image (without comparison to reality which people aren't usually > able to do when looking at a photo) and therefore not aesthetically > objectionable. One might say that if they aren't visible they don't > really matter, and that's fine. I'm just pointing out that some of > the perceived detail increase you get from omitting the AA filter > isn't accurate/real, but I realize that some may be willing to pay > that price for sharper looking images. > > If the image projected on the sensor (including lens imperfections, > diffraction, camera shake during the exposure, etc.) has the right > amount of blur to be Nyquist sampled by the pixel pitch then you won't > get aliasing, and adding an AA filter might unnecessarily decrease the > resolution by something like sqrt(2). So in that case there would be > no advantage to an AA filter and for all I know that may be a common > situation. Personally, I think I would rather give up a little > resolution to know that I won't be adding artifacts to the image (but > I've never used an AA filter-free camera so this is all theory), so I > hope I'll continue to have that choice as with the K-5 II and IIs. > > Nothing in here will be news to you, but I found this recently (via > PetaPixel) and thought it was pretty good (though admittedly it > approaches from the "all artifacts are bad even if you can't see them" > point of view): > http://www.martin-doppelbauer.de/foto/tippstricks/aliasfilter/index.html > > P.S. For the record, if anybody wants to give me a Leica with no AA > filter I will not turn it down! > > > On Thu, Feb 21, 2013 at 5:48 PM, Matthew Hunt wrote: >> On Thu, Feb 21, 2013 at 5:30 PM, Bryan Jacoby wrote: >> >>> I agree that it will be a practical problem very rarely given the >>> pixel pitch. But I think that is another way of saying that the >>> sensor is over-resolving what the lens, etc. can do. Which I think is >>> another way of saying what you're mostly getting is bigger files, not >>> more real detail in the images. >> >> Well, I don't think that's quite right... with good lenses at a sharp >> aperture and careful technique, I think you can make use of the sensor >> resolution and achieve high detail. But to provoke moire, you need a >> pattern with just the right spatial frequency in the same part of the >> image where you're achieving that sharpness. I think it's the >> combination of those two factors that makes it so rare in practice, >> rather than it just being a matter of the sensor always over-resolving >> the optics. >> >> -- >> 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. -- -bmw -- 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 Japan rumors: 24MP K-3 in April, 645Dii in June
On Thu, Feb 21, 2013 at 5:45 PM, Bryan Jacoby wrote: > Nothing in here will be news to you, but I found this recently (via > PetaPixel) and thought it was pretty good (though admittedly it > approaches from the "all artifacts are bad even if you can't see them" > point of view): > http://www.martin-doppelbauer.de/foto/tippstricks/aliasfilter/index.html I shared that link 8 days ago in the "Last call for K-5" thread, but it elicited no comments, which surprised me, a bit. -- 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 Japan rumors: 24MP K-3 in April, 645Dii in June
I think we're thinking about slightly different things. I agree with what you say about visible moire, but I'm also thinking about non-moire aliasing artifacts. These still represent (in my mind at least) a corruption of the image, but they are not easily visible in the image (without comparison to reality which people aren't usually able to do when looking at a photo) and therefore not aesthetically objectionable. One might say that if they aren't visible they don't really matter, and that's fine. I'm just pointing out that some of the perceived detail increase you get from omitting the AA filter isn't accurate/real, but I realize that some may be willing to pay that price for sharper looking images. If the image projected on the sensor (including lens imperfections, diffraction, camera shake during the exposure, etc.) has the right amount of blur to be Nyquist sampled by the pixel pitch then you won't get aliasing, and adding an AA filter might unnecessarily decrease the resolution by something like sqrt(2). So in that case there would be no advantage to an AA filter and for all I know that may be a common situation. Personally, I think I would rather give up a little resolution to know that I won't be adding artifacts to the image (but I've never used an AA filter-free camera so this is all theory), so I hope I'll continue to have that choice as with the K-5 II and IIs. Nothing in here will be news to you, but I found this recently (via PetaPixel) and thought it was pretty good (though admittedly it approaches from the "all artifacts are bad even if you can't see them" point of view): http://www.martin-doppelbauer.de/foto/tippstricks/aliasfilter/index.html P.S. For the record, if anybody wants to give me a Leica with no AA filter I will not turn it down! On Thu, Feb 21, 2013 at 5:48 PM, Matthew Hunt wrote: > On Thu, Feb 21, 2013 at 5:30 PM, Bryan Jacoby wrote: > >> I agree that it will be a practical problem very rarely given the >> pixel pitch. But I think that is another way of saying that the >> sensor is over-resolving what the lens, etc. can do. Which I think is >> another way of saying what you're mostly getting is bigger files, not >> more real detail in the images. > > Well, I don't think that's quite right... with good lenses at a sharp > aperture and careful technique, I think you can make use of the sensor > resolution and achieve high detail. But to provoke moire, you need a > pattern with just the right spatial frequency in the same part of the > image where you're achieving that sharpness. I think it's the > combination of those two factors that makes it so rare in practice, > rather than it just being a matter of the sensor always over-resolving > the optics. > > -- > 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: New Japan rumors: 24MP K-3 in April, 645Dii in June
On Thu, Feb 21, 2013 at 5:30 PM, Bryan Jacoby wrote: > I agree that it will be a practical problem very rarely given the > pixel pitch. But I think that is another way of saying that the > sensor is over-resolving what the lens, etc. can do. Which I think is > another way of saying what you're mostly getting is bigger files, not > more real detail in the images. Well, I don't think that's quite right... with good lenses at a sharp aperture and careful technique, I think you can make use of the sensor resolution and achieve high detail. But to provoke moire, you need a pattern with just the right spatial frequency in the same part of the image where you're achieving that sharpness. I think it's the combination of those two factors that makes it so rare in practice, rather than it just being a matter of the sensor always over-resolving the optics. -- 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 Japan rumors: 24MP K-3 in April, 645Dii in June
I agree that it will be a practical problem very rarely given the pixel pitch. But I think that is another way of saying that the sensor is over-resolving what the lens, etc. can do. Which I think is another way of saying what you're mostly getting is bigger files, not more real detail in the images. On Thu, Feb 21, 2013 at 5:21 PM, Matthew Hunt wrote: > On Thu, Feb 21, 2013 at 5:18 PM, Bryan Jacoby wrote: > >> I am surprised that the D7100 is only being made without an AA filter >> (unlike D800/E and K5 II/s). I hope this isn't contagious. > > Moire already seems to be pretty rare on the K-5 IIs and D800E by most > accounts, and with 24 MP in an APS-C format, it will be even more rare > on the D7100 due to the small pixel pitch. I'd probably be impressed > with my technique if I managed to provoke it. > > -- > 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: New Japan rumors: 24MP K-3 in April, 645Dii in June
On Thu, Feb 21, 2013 at 5:18 PM, Bryan Jacoby wrote: > I am surprised that the D7100 is only being made without an AA filter > (unlike D800/E and K5 II/s). I hope this isn't contagious. Moire already seems to be pretty rare on the K-5 IIs and D800E by most accounts, and with 24 MP in an APS-C format, it will be even more rare on the D7100 due to the small pixel pitch. I'd probably be impressed with my technique if I managed to provoke it. -- 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 Japan rumors: 24MP K-3 in April, 645Dii in June
I am surprised that the D7100 is only being made without an AA filter (unlike D800/E and K5 II/s). I hope this isn't contagious. (I suppose the same is true of the 645D, but that's not really a mainstream product.) On Thu, Feb 21, 2013 at 3:47 PM, Matthew Hunt wrote: > On Thu, Feb 21, 2013 at 3:30 PM, Darren Addy wrote: > >> This is apparently from the March issue of Nippon magazine (pg 179) >> Google translation of discussion thread. >> http://translate.google.com/translate?twu=1?sl=ja&tl=en&u=http%3A//s.kakaku.com/bbs/K416049/SortID%3D15794099/ >> or >> http://goo.gl/No5uD >> >> The translation is hard enough to read. But the K-3 introduction in >> April would be in line with what was rumored earlier, that Sony needed >> 6 months lead time in the market for the 24MP sensor that Pentax will >> be getting more out of than Sony did. >> : ) > > It seems plausible, since Nikon just announced the D7100 (24 MP, > APS-C, no AA filter). K-3 : D7100 :: K-5 : D7000... > > -- > 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: New Japan rumors: 24MP K-3 in April, 645Dii in June
On Thu, Feb 21, 2013 at 3:30 PM, Darren Addy wrote: > This is apparently from the March issue of Nippon magazine (pg 179) > Google translation of discussion thread. > http://translate.google.com/translate?twu=1?sl=ja&tl=en&u=http%3A//s.kakaku.com/bbs/K416049/SortID%3D15794099/ > or > http://goo.gl/No5uD > > The translation is hard enough to read. But the K-3 introduction in > April would be in line with what was rumored earlier, that Sony needed > 6 months lead time in the market for the 24MP sensor that Pentax will > be getting more out of than Sony did. > : ) It seems plausible, since Nikon just announced the D7100 (24 MP, APS-C, no AA filter). K-3 : D7100 :: K-5 : D7000... -- 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 Japan rumors: 24MP K-3 in April, 645Dii in June
I assume that would be an APS-C successor to K-5. Full frame is probably at least a year away. On Feb 21, 2013, at 3:30 PM, Darren Addy wrote: > This is apparently from the March issue of Nippon magazine (pg 179) > Google translation of discussion thread. > http://translate.google.com/translate?twu=1?sl=ja&tl=en&u=http%3A//s.kakaku.com/bbs/K416049/SortID%3D15794099/ > or > http://goo.gl/No5uD > > The translation is hard enough to read. But the K-3 introduction in > April would be in line with what was rumored earlier, that Sony needed > 6 months lead time in the market for the 24MP sensor that Pentax will > be getting more out of than Sony did. > : ) > > -- > 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.
New Japan rumors: 24MP K-3 in April, 645Dii in June
This is apparently from the March issue of Nippon magazine (pg 179) Google translation of discussion thread. http://translate.google.com/translate?twu=1?sl=ja&tl=en&u=http%3A//s.kakaku.com/bbs/K416049/SortID%3D15794099/ or http://goo.gl/No5uD The translation is hard enough to read. But the K-3 introduction in April would be in line with what was rumored earlier, that Sony needed 6 months lead time in the market for the 24MP sensor that Pentax will be getting more out of than Sony did. : ) -- 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.