Bit depth = levels of gradient?

Started 2 months ago | Discussions thread
D Cox Forum Pro • Posts: 23,702
Re: Bit depth = levels of gradient?

threw the lens wrote:

Where bit depth really comes into its own is post processing.

It's been that way in other fields too. For instance a CD may "only" be 16 bits, but if you re mastering on the equivalent of a digital 8 track, 24 bits will be good to have, because you could be potentially summing the values of all those tracks and want some headroom for post processing.

You might not need more than 12 bit colour for a photo if you expose correctly for instance, but when you try to pull the effects sliders around in raw then you can run into artefacts at over 1 stop change in exposure.

Software such as Photoshop does its calculations in 16-bit, even if the camera saved 12-bit files.

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