 Bennie G. Lindeque |
Digital Vs. Film Latitude The concept of film latitude is well-established for B/W, color negative, and color slide film. But what is the situation with digital cameras? I shoot with a Canon D20. Is the latitude greater for overexposure or greater for underexposure? Is that a concept relevant to digital photography?
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John A. Lind |
Bennie, In general - and this is a generalization - digital has a latitude between negative and chrome. Two issues ... Highlights: Unlike film, though (negative in particular), one must watch highlights, as they seem to go from detail to complete washout almost without warning ... almost a "step function" in highlight response. It's one of the things I know wedding and portrait photographers using digital concern themselves with. I'm uncertain if this is mitigated by working in RAW, though. Shadows: Noise is one of the noted problems in deep shadow. There are noise "filters" intended to remove it, but they can have unintended side effects, more noticeable in some photographs than others, as the algorithms are less than perfect.
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Michael H. Cothran |
Let me add something to John's excellent response: If you are really interested in expanding the visual range of your current digital camera, there are ways to accomplish this in post editing softwares like PS. Also, Fuji's new pro model S3 addresses this issue with a new dual dynamic range, purportedly being able to hold detail in both shadow and highlights better than anything else on the market. Magazine tests I've read seem to support this claim. Michael H. Cothran www.mhcphoto.net
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