On 1/25/2016 5:00 PM, Mike Gordon via olympus wrote:
(Yes, Chuck and Mike, I know f11 should lose sharpness to diffraction, and I
know deconvolution sharpening shouldn't bring it back. And yet experience flies
in the face of theory, and that's the sweet spot for this sensor/lens
combination. ;-) )
Erroneous Moose
I think you remember my original post on this but may have been away for the
f/u.
I read it all, including Roger's conclusions.
One more thing to add to the hopper is that a 16 MP sensor isn't really. As I've pointed out, HR Mode files downsampled
to the same dimensions as the 16 MP sensors are significantly sharper, revealing more fine detail than images taken at
the same time with the same camera, lens and settings in normal mode.
Ctein said about this, "I'm not surprised by the extra detail in the down-sampled HR photographs. Keep in mind that a
conventional Bayer array photograph is only about 50% efficient in terms of spatial frequencies-- that is, you get about
eight megapixels worth of actual fine detail out of a 16 megapixel file. That's normal. It's also dependent upon the
color of the subject, since the blue and red array pixels are sparser than the green ones. When you're downsampling from
the HR file, you really can get a full pixel's worth of genuine fine detail out of each and every pixel, so it's like
comparing an eight megapixel camera to a 16 megapixel camera. "
Diffraction lowered from 8 MP to 5 by diffraction doesn't sound as bad as 16 to
5. :-)
Especially when you remember that resolution is linear, while MP count is area, so the linear decrease is about 20%.
that's no much over what it noticeable, and demonstrably bit less than is gained in DoF for many subjects, particularly
long tele and macro.
...
Very nice bee shot, BTW.
Thanks!
--
What if the Hokey Pokey *IS* what it's all about?
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|