I use a lot of digital ink on technical minutiae. I don’t apologize for that. But let’s not forget the important part of photography. Many years ago, at a post dive trip party, I brought a set of (Fuji Pictrography, which shows you how long ago it was) prints. The hostess, who was a writer, said,… [Read More]
MTF sharpness testing with Lightroom
From the mailbag: Nice A7II IBIS test. It would be great to compare to the A7 sans IBIS. A comment and a question: It looks like the A7II has a stronger AA in one direction (H), similar to the A7 and D6x0. Assuming you are trying to evaluate the capabilities of the (IBIS) hardware, why… [Read More]
Testing IBIS on the Sony a7II
There are many small improvements in the Sony alpha 7II over the alpha 7 which it replaces. There is one big one: the in-body stabilization system (IBIS), which Sony calls SteadyShot. It has the potential to reduce the effects of camera motion somewhat when used with lenses that have optical stabilization, and a lot in… [Read More]
D810 vs a7R sensor performance
Now I’m ready to tackle the question that interests at least some of you: how does the sensor in the Nikon D810 compare with the one in the Sony alpha 7R? The D810 has greater full well capacity: But the a7R has lower read noise through much of the ISO range: When you put those… [Read More]
Modeling the Sony alpha 7R
I’ve received requests to compare the Sony a7R sensor to that in the Nikon D810. I’ll do that next time, but first I have to show you all an analysis of the a7R sensor itself. Here is the read noise versus ISO setting, with a separate camera model constructed for the data from each ISO. Only… [Read More]
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