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]
Shutter shock revisited
From the mailbag: I see you have a Sony a7 II. Does the internal stabilization help with the shutter shake? The a7II doesn’t suffer from shutter shake, if you use electronic first curtain shutter. If you turn EFCS off, it does, but you only would do that if you were going to use a very high… [Read More]
Dynamic Range Comparisons with simulated cameras
In yesterday’s post, I speculated that the Claff Photographic Dynamic Range Curves created by by direct search might be smoother if the searched data set was from a simulated camera rather than a real one. I programmed up a Nikon D4 simulator that used the modeled read noise values from the data set. I picked… [Read More]
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