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2017 Tom Antos DR test


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I'm not having time to do any shootouts lately, but luckily other people are running very nice tests. This one by Tom Antos is so interesting I decided to post about it. Watch it in full here.

I prefer the tests where you shoot a regular scene and then start overexposing and underexposing until some parts of the image break down, because these chart tests don't account for noise very well and can overstate the usable DR by several stops. Also, the bias is bigger on compressed video than on uncompressed RAW, which skews the results. But this one is still very well done and the results are interesting, and match well my 2014 shootout. In particular, he finds a 2.5-stops advantage for the a6300 with slog2 with respect to the GH4 with CineLikeD, where my test said it was three. Close enough.

I'm reading his images on my own, and not relying on his waveform measurements. We seem to have different criteria for deciding what counts and what doesn't. Go watch the video if you want to reach your own conclusions.

So, this is what I see (scroll down to see a full-res version of this chart):

Also, adding to this the results from Cinema5D, here and here, and starting from the assumption that the a6300 and the a7S II have exactly the same dynamic range (as I believe is the case), then the FS7 has one stop better DR than the a6300/a7SII (so it's tied with the BM 4.6k, and slightly ahead of the C300II, which is not that much better than the a7S II in terms of DR), and the Alexa has another stop more than that.

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