On 9/21/2011 4:22 PM, Godfrey DiGiorgi wrote:
On Wed, Sep 21, 2011 at 2:51 PM, Tom C<caka...@gmail.com> wrote:
http://www.luminous-landscape.com/reviews/cameras/sony_nex_7_first_impressions.shtml
Among other things (pre-production model):
...
"... if ones expectations are realistic this new 24MP sensor really
satisfies. At ISO 100 to 400 its noise characteristics are excellent.
At 800 it is still very good, and little to no additional luminance
noise reduction is needed. At 1600 some luminance noise is visible at
pixel peeping on-screen sizes, but hardly at all on even very large
prints. At ISO 3200 and beyond noise become increasingly a factor, and
how much of an issue it may be for an individual photographers needs
will have to be determined."
...
It sounds like Sony sacrificed some of the stratospheric ISO
capabilities for a higher resolution sensor. Not an unheard of
trade-off, but some will take exception to it, I'm sure.
Interesting, since diffraction limiting seems to be purely based on
sensor resolution and f/stop, rather than the actual physical size of
the aperture, using the calculator at:
http://www.cambridgeincolour.com/tutorials/diffraction-photography.htm
it would seem that it is diffraction limited somewhere between 5.6 and
8. I also suspect that with some clever math, a lot of the noise and
diffraction issues could be greatly alleviated by downrezzing to
something like 12 MP.
Otherwise, it looks like a very nice camera. Time will tell ... I look
forward to hearing what you say about it once you get to work with it.
I'm rather curious myself. I suppose they could always make a version
with the K-5 sensor for people who are more likely to photograph indoors
without a flash than they are to print significantly larger than
13x20.5" (24MP at 300dpi) though I suspect you could go quite a bit
larger if you wanted.
--
Larry Colen l...@red4est.com (from dos4est)
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