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#1 Martin Breidt

Martin Breidt

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Posted 14 June 2012 - 08:09 AM

Hello,

I am trying to figure out some low-level temporal characteristics of film exposure.

In particular, I am looking for detailed information what exactly happens when a film frame is exposed:
  • When/how is the frame being transported behind the lens at what point in time?
  • When/how is the shutter being opened in what period of time over which part of the frame?
  • At what point in time is the shutter being closed, and how?
  • How is the shutter constructed mechanically, and what triggers it?

I would like to understand those details in order to relate analog film camera technology to digital film with global and rolling shutter.

Attached is a synthetic exposure-time diagram for a simulated rotary disc shutter similar to http://en.wikipedia....ry_disc_shutter (but with the shutter positioned below the (landscape) frame). I would like to understand whether that is an accurate representation of what really is happening?

In addition to the recording side, I would like the same information for the projection side (double flashing etc.).

Any advice or pointer to existing information or books would be most welcome,
thank you very much
Martin

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