Yesterday I talked about the way that the ISOs below base ISO are implemented in the Sony a7RII. Today I’ll turn my attention to the Nikon D810, using the same methodology. You might want to look at yesterday’s post if you haven’t seen it already. Here are the statistics for a series of images exposed… [Read More]

From the mailbag: I told [name] that the ISO values below 100 on the A7R2 are “fake” and that the dynamic range measurements you provided for those ISO values are spurious. I tried to find where you discussed that and was not able to. [name] was asking for a link. Do you have anywhere on… [Read More]

In yesterday’s post, I talked about a situation that the Sony a7RII autofocus didn’t handle very well. Actually, as I said then, I think the camera’s autofocus is probably doing fairly well, but the combination of a slowish autofocusing lens (compared to some moderately rapid to breathtakingly rapid Nikon lenses) and EVF lag and blackout… [Read More]

I have tested the accuracy of the Sony a7RII autofocus for static subjects; the results were impressive. I have used the camera for many actual photographic people shots. On the whole, the autofocus systems (I say systems, because there are a dizzying number of modes and sub-modes) have performed their task with remarkable flexibility and… [Read More]

There has been a little speculation that the increase in noise observed in the ISO 100 long exposure noise reduction (LENR) images in yesterday’s post might be wholly or in part the result of the a7RII’s dropping into 12-bit precision when LENR is active. Fortunately, there’s a way to test that. Yesterday’s exposures were 30… [Read More]