Film vs D800E

Started Jan 28, 2013 | Discussions thread
Marianne Oelund Veteran Member • Posts: 6,726
The final irony

bigpigbig wrote:

Once we got to an exposure approaching 12 minutes we were stunned. All 36 exposures were clearly visible. With a high contrast filter we made the final print.

It is the non-linearity of film which provides the dynamic-range compression it possesses.  As film becomes exposed, its sensitivity decreases.  The curve for this isn't logarithmic, but it's similar enough, that film seems to behave like the human visual response.

Digital cameras are very linear devices (until they saturate, and then their sensitivity goes abruptly to zero).  That linearity, combined with the precision of today's 14-bit converters, gives them an ability to detect extremely fine tonal changes over much of the tonal scale - exactly what you want to recover overexposed film images!

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Qualities possessed by God in infinite proportion: Love, Grace, Power, Righteousness, Wisdom, . . .
Qualities possessed by humans in infinite proportion: Ignorance.
- Marianne

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