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Found 1 result

  1. I just upgraded to a 6D and checking in theory, what is the ideal ISO and frametime for the new setup. Looking at the read-noise characteristics, ISO should not be kept low - however, increasing the ISO kills the full well capacity, at ISO3200 I got only 2400e-(!), which quickly leads to DR problems. I feel ISO1600 could be a meaningful compromise between FW and read noise. Regarding noise and frametimes: I know, long subs are in general preferred. Looking at the overall S/N formula, in theory I'd loose only about 20% on the S/N if I shoot 10 subs instead of one long exposure thanks to the ~3e- read noise. Is my maths right? If the read noise is significantly below 5e-, can we really go in photon counting mode/save a lot on mounts? I made a quick excel plot on the story: practically ISO3200 delivers the same results using 10 frames as 5 frames shot at iso 800. I added 0.2e-/sec/pixel dark noise (~5°C cooled eos 6D value) and a signal, that generates 150electrons in a 2 minutes sub, I didn't add photon noise.
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