Originally posted by Imageman Ive not closed the comp because so far ive only had a couple of entries, ill let it run a little to get a consensus.
I don't need many but 3 or 4 entries aren't enough to see if you guys are sharp eyed enough to see a difference.
The real question of course is are the unsharp mask versions close to the pentax version in quality or is the pentax version miles better.
And I know this is being picky, but id prefer you to judge with your eyes rather than use a sophisticated image analysis tool to make the judgement.
I am lost here
Pentax introduce a procedure that is supposed to increase resolution for diffrection limited images.
you in contention produce 4 images from a low resoltuion target and ask which is from the Pentax procedure.
Given no part of your presented image would have been blurred or obscured by difraction at any aperture just what are you trying to show ??
If what you showing is that unsharp mask sharpens images just as Pentax procedure does then yes but Dah pretty obvious, If you trying to show unsharpmask will recover as much lost detail the your 'test' images are a fail as there is no lost detail to recover anyway.
---------- Post added 18-07-14 at 11:33 AM ----------
Originally posted by JPT Regarding imageman's challenge, I can't see much difference between them. But just because the end result looks the same, that doesn't mean it is produced by the same means. It seems to me that both techniques are aiming to make the image sharper, so I'm not surprised the results are so similar.
Nothing here demonstrates that lens-specific information is not used in whatever method Ricoh is using here. I think the accusation is that Ricoh is just making stuff up to limit the use of diffraction correction and make the newer lenses look more attractive in comparison to used lenses. I don't think you're any closer to proving that. And I don't think it would be in character for Ricoh to do that. What other features are artificially disabled for old lenses? I would tend to take Ricoh's word for it.
So I see this as being a very useful feature, which means better out-of-camera results for many users.
I think you give more credit than is due
Pentax are a commercial organisation they will do/say anything legal to increase profits within their own moral compass.
give ca correction is enabled in the da18-250 but not in the identical tamron 18-250 Pentax has clearly shown their view on in camera correction and lens compatability.
so I'd say it is in chracter for Ricoh and any other manafacture to promote sales of their own lens by camera additions , I'd also say I see nothing wrong with this it fair pay for the R&D used to develope the feature.
Besides the very fact the camera identifies the lens prior to 'correction' means in all probablilty MTF from the lens is used in algorythmns so Pentax claims are undoutedly true. (maybe not required but true none the less).