Well it’s one thing to score well in a luminosity for Imatest but it’s another to get good colour rendition and from what I’ve seen so far the Sony A7Rii has a lot better colour rendition in the shadows straight out of camera. Have a look at the bottom of the page for the change in dynamic range at higher ISOs. Imatest was quite variable from run to run but these averages seems sensible when I compare the test with checking clipping in rawdigger and looking at the tones in the deep shadows.
#RAWDIGGER AVERAGE ISO#
I've just run the Imatest four times now and for the 100 ISO value I get average values of 10.9 stops for the Canon 5DS, 12.2 stops for the Sony A7R and 12.5 stops for the Sony A7Rii. This process entails taking a photograph of a Kodak step target at 4 different exposure 3 stops apart and processing them in Imatest. However, I was still a little suspicious about just what the dynamic range of the Sony A7Rii would be when compared with the A7R and first of all I tried the Imatest step target tests. Analysing Dynamic Range in Controlled Conditions The Sony holds some tone in the shadows which is nice but not arguably essential. Yes it's clipped the shadows but this doesn't really affect the aesthetics of the shot. You can see here that when you expose a difficult subject the Canon actually looks pretty good and very close to the Sony.
#RAWDIGGER AVERAGE FULL#
Here’s the full frame at approximately the same exposure level as our previous test (1/1000 at f/8 on the Sigma 24mm Art lens).Īnd here’s the comparison of a shadow area on the Canon 5DSr first and then the Sony A7Rii. In this case the Sony exposure is a ⅓ of a stop darker than the Canon exposure. However I thought it common sense to show a photo where the exposure settings were the same, even if it does disadvantage the Sony A7Rii by a small amount. I did have a frame with the same exposure settings for each camera but the light levels were definitely at least a stop different (we checked the histograms using rawdigger to confirm it wasn't just a camera histogram thing). I don’t have an exact record of the light for each of the tests (I should have used an external light meter) but I can say that for each individual test the lighting didn’t change significantly.
Of all of the discussion, there was one dominant theme and that was the problem with different exposure settings for the tests and pointing out that the Sony A7Rii had a longer shutter speed than the Canon or the A7R. Well yesterday’s dynamic range test was controversial if nothing else ( click here to read the article) I’ll stand by the result though as today I spent a good part of the morning testing the A7Rii using Imatest and also trying to find out just what the visual quality range of the camera is. Amateur Photographer who plays with big cameras and film when in between digital photographs.
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