Eos6D at 25000iso...image quality reality check!
- Thread starter Ivan Muller
- Start date
CTJohn said:
Not unless you're needing the bit of dynamic range you're loosing on iso3200->6400. Canon does a very good job at 6400 on the 6d, I use it myself when in a pinch - but when in doubt don't hesitate to simply underexpose 3200. But everything >6400 is simply a waste if you're shooting raw stills.
More tech explanations can be found in the Magic Lantern forum, they discovered this when developing their mini_iso module that tweaks the various amplifier stages of the image processing chain.
Sabaki said:
No, iso 50 (for the cameras that have it, i.e. not 6d) is simply iso 100 overexposed - check the dynamic range curve, magically iso 50 has one stop less than iso 100
. Iso 50 is very useful though for fast lenses because you don't need to use a nd filter if your shutter speed is maxed out.Sabaki said:
If you're digitial iso, you're simply under/overexposing in-camera. The result is that the histogram only gets shifted left or right, and the side part gets chopped off (i.e. you're loosing dynamic range). The noise level & color fidelity is the same as the base "analog" iso that's actually set on the sensor.
Intermediate iso steps are nice for video, jpeg, timelapses, whatever - but not for shooting raw stills, in the best case you're gaining nothing, in the worst case you're throwing away image data.
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Keith_Reeder said:
Almost every rumor, review, discussion and reply I have read so far on the web, here and elsewhere laments the fact that Canon has not brought out a higher megapixel camera to rival the A7r and 800/e/810 and improve dynamic range, as it is perceived by many to be lacking in competitive shadow noise.....Keith I am sure you would probably disagree with that but that is MY impression ....
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