Yesterday, I showed you histograms of raw dark-field images from the Sony a7RII with release 3.30 firmware with ISO’s between 100 and 1600. The red and blue channels looked pretty similar to the FW 1.0 images I made last year. However, the green channels did not. The uncompressed green channels were more ragged, and the… [Read More]

A little over a year ago, I posted dark-field histograms from the Sony a7RII with FW 2.0, which was the first firmware release to support uncompressed raw. Today I’m doing a similar post for FW 3.3. You might want to open up both posts in separate tabs to see the differences. The green histograms are… [Read More]

We have seen here and here that the Sony a7RII running firmware 3.30 spatially filters raw images prior to writing them to the flash card at shutter speeds slower than 3.2 seconds. The camera did similar filtering for bulb exposures in earlier releases. A DPR poster earlier proposed that the algorithm Sony used was the… [Read More]

We have seen here and here that the Sony a7RII running firmware 3.30 spatially filters raw images prior to writing them to the flash card at shutter speeds slower than 3.2 seconds.  There has been an Internet report that some Nikons did something similar, but that they could be tricked into not doing it by… [Read More]

Yesterday, I reported that the Sony a7RII with firmware 3.30 performs low-pass spatial filtering at base ISO for exposures longer than 3.2 seconds. Today, I’m going to look at some other ISO settings. What I will show is spectral analyses of the raw red channel of exposures of the back of the body cap. Shutter mode… [Read More]