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Maximum Density on Filmscannes and Recorders


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#1 PStalla

PStalla

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Posted 03 April 2006 - 10:02 AM

Hi,

I am a little bit in trouble with the parameter film density concerning scanning and recording 35mm film. But at first: Sorry for my poor English, I am from Germany...

Scanners:
Filmscanners should be able to capture the maximum density difference of a neg film stock, which can be about 2. Arri for example scans each negative twice with a system called double exposure, one with less, one with more light, to get all the density information. I hope this information is right?!

Recorders:
Recorders should be able to reproduce density differences back on the Intermed Negativ oder Negativ stock. Maximum density of a neg is 2, of an intermed neg about 2,6 to 3. But can't every recorder almost record invinite density on a film stock just by making the exposure time longer? Or is there something I forgot, and long exposure times in scanner perhaps produce certain errors or something else I don't know about?

Thanks in advance for every answer!

Philippe
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