the last word

I got RawDigger to work on the NEX-7 files by running it on a different computer, so I have the NEX-7 results now. The self heating test at ISO 6400 and 1/4 second exposures of blackness shows some slight self heating (look at the dotted green line, which is a straight line fitted to the… [Read More]

I made all the exposures for the Sony NEX-7 testing, but I have a problem; RawDigger crashes when I try to save selections from the NEX-7 raw files, even though it works fine with the Sony RX-1 raw files. So there will be a hiatus of indeterminate duration while I wait for a fix. The… [Read More]

I ran the same series of tests that I’ve run on the D4, D800E, and M9 on the Sony RX-1. I expected to find more signs of self heating of the sensor, since the RX-1 runs with live view on all the time, but I did not. Here’s a series of closely-spaced exposures of 1/4… [Read More]

Today I repeated the whole series of noise-vs ISO setting tests for the Leica M9. First, a check for self-heating with a series of repeated 1/4 second exposures of blackness at maximum ISO. Here’s the average value of the noise floor over the series: And here’s the standard deviation (the noise of the noise) over… [Read More]

I went through yesterday’s D4 testing, this time with the D800E. First, a check to make sure there are no serious self-heating problems. Exposure was 1/4 second at ISO 6400 at one frame per second. Subject was the back of the lens cap: And the standard deviation (noise of the noise floor) looked like this:… [Read More]