cgarcia wrote: skibum5 wrote:
EDIT: apparently on DPR there is talk that DUalPixel RAW will somehow allow an extra stop of highlights though, haven\'t time to read it now, if actually true and it doesn\'t rob shadows (in which case it really isn\'t giving more highlights anyway) and there are no weird gotchas, that would be pretty cool news, at the cost of having to deal with 60MP files for a 30MP image you could then have the 13.4 stops turn into 14.4 stops?? IF, if that is actually true, then it suddenly does become much more interesting. 14.4 stops would be plenty good. You fire off typical shots in 30MP mode, use 60MP data size mode for the high DR non-action stuff (files too large for a good enough buffer for most sports; but still get a solid 13.4 for sports action). Hope this is really true.
Can\'t be true (outside technical stuff: if it were so easy to increase the DR by using smaller subpixels, all DSLRs long time ago would have been using phone-camera-sized pixels combined). The ADCs are more than capable to extract all the truly available DR, and nobody (except maybe God) can change noise into signal...
You need storage and CPU power to handle all those extras though and smaller process to make all those split or mini-sites so that explains that in part at least.
I still haven\'t had time to look it over, but doesn\'t that Illiah guy program RAW converters? I\'d think he knows what he is talking about. It seemed like you could just treat the dual pixels as a single normal combined one for how you handle all of the image aside from the very top step beyond what the main channel provides, the main one seems to clip 1 stop before the extra channel so then you use the extra channel for the top bits (and who cares at that point if the light collecting area might be only 1/2, at the very top step, at ISO100, who cares about noise, you have more than enough light way up there).
So he seems to think you could simply set it so you just barely save the highlights as you normally would but then dial in an extra stop of exposure and then in post the extra stop that would be clipped can be saved from the extra channel while at the same time the extra stop exposure cleans up the shadow noise by a stop and thus you can turn say 13.4 stops (borderline marginal) into 14.4 stops (excellent and state of the art for ISO100 and, most importantly, enough to capture a lot of tricky scenes with a single exposure).
Again, I\'ve been out and busy and haven\'t really looked over those posts and thought about it so maybe there is some bad flaw and it\'ll be stuck at 13.4, but if not, 14.4 is pretty nice (yeah you waste storage and store 60MP worth but not the end of the world, except for sports, but lots of sports cameras haven\'t had much more than the 13.4 stops yet anyway and you might still get enough buffer even with the \'60MP\' files for some wildlife work).
cgarcia wrote: skibum5 wrote:
EDIT: apparently on DPR there is talk that DUalPixel RAW will somehow allow an extra stop of highlights though, haven\'t time to read it now, if actually true and it doesn\'t rob shadows (in which case it really isn\'t giving more highlights anyway) and there are no weird gotchas, that would be pretty cool news, at the cost of having to deal with 60MP files for a 30MP image you could then have the 13.4 stops turn into 14.4 stops?? IF, if that is actually true, then it suddenly does become much more interesting. 14.4 stops would be plenty good. You fire off typical shots in 30MP mode, use 60MP data size mode for the high DR non-action stuff (files too large for a good enough buffer for most sports; but still get a solid 13.4 for sports action). Hope this is really true.
Can\'t be true (outside technical stuff: if it were so easy to increase the DR by using smaller subpixels, all DSLRs long time ago would have been using phone-camera-sized pixels combined). The ADCs are more than capable to extract all the truly available DR, and nobody (except maybe God) can change noise into signal...
I still haven\'t had time to look it over, but doesn\'t that Illiah guy program RAW converters? I\'d think he knows what he is talking about. It seemed like you could just treat the dual pixels as a single normal combined one for how you handle all of the image aside from the very top step beyond what the main channel provides, the main one seems to clip 1 stop before the extra channel so then you use the extra channel for the top bits (and who cares at that point if the light collecting area might be only 1/2, at the very top step, at ISO100, who cares about noise, you have more than enough light way up there).
So he seems to think you could simply set it so you just barely save the highlights as you normally would but then dial in an extra stop of exposure and then in post the extra stop that would be clipped can be saved from the extra channel while at the same time the extra stop exposure cleans up the shadow noise by a stop and thus you can turn say 13.4 stops (borderline marginal) into 14.4 stops (excellent and state of the art for ISO100 and, most importantly, enough to capture a lot of tricky scenes with a single exposure).
Again, I\'ve been out and busy and haven\'t really looked over those posts and thought about it so maybe there is some bad flaw and it\'ll be stuck at 13.4, but if not, 14.4 is pretty nice (yeah you waste storage and store 60MP worth but not the end of the world, except for sports, but lots of sports cameras haven\'t had much more than the 13.4 stops yet anyway and you might still get enough buffer even with the \'60MP\' files for some wildlife work).
Aug 30, 2016 at 07:20 PM
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