Originally posted by Erik That's just very strange. Is this consistent with any other K-5 pictures at all?
JohnBee fooled me
He posted 200% crops w/o saying so. I now corrected my post and the sharpened result looks a bit better.
Originally posted by Gimbal I noticed the colorful lines as well, but the K5 still have the false pixels in between the lines which also is a sure sign of a weak AA-filter. So I'm thinking they have done some color noise reduction even on base iso.
I don't think color noise reduction is at work. False line demosaicing is normal near the Nyquist limit and the AA filter is meant to get rid of color Moiré because it can remain visible even at low magnification (for a texture large enough).
Originally posted by Erik Well, okay, these are 200% crops for some reason. Both the K-5 and D7000. The extra "pixels within pixels" are just JPEG artifacts. Nevermind.
yeah ...
Originally posted by JohnBee Falk, perhaps it would be better if you worked with the originals?
I fixed it anyway. Maybe next time, you leave a notive when posting 200% crops
Originally posted by JohnBee However, since the results seem consistent with other testing sites also, I think it gives use good cause for investigation.
I am sorry to say but this isn't the way to proceed.
The only way to approach the topic is by doing controlled lab tests allowing to vary each parameter independently from other parameters. In my "lumolabs" Understanding Image Sharpness white paper I explained the procedure.
Failing to do so will allow to spread about every possible meme. Not a good thing.
That's the last thing I seriously say about K-5 image sharpness before I had a chance to really examine image sharpness and parameters influencing it. Currently, I don't have much time to do that but I plan to look at it.
Anyway, there is little reason to believe that differences in perceived sharpness are due to anything else than the quality of lens, tripod, focus and tester. Even if AA filters differ, an AA filter can be both, too strong
or too weak. Some 645D shooters already noticed the caveats of the missing AA filter.