Jump to content


Photo

Frame exposure timings


  • Please log in to reply
No replies to this topic

#1 Martin Breidt

Martin Breidt

    New

  • Basic Members
  • Pip
  • 1 posts
  • Other

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

Attached Images

  • exposure.png

  • 0


CineLab

Metropolis Post

Tai Audio

Glidecam

Wooden Camera

Media Blackout - Custom Cables and AKS

Willys Widgets

Abel Cine

Aerial Filmworks

CineTape

Ritter Battery

rebotnix Technologies

FJS International, LLC

Visual Products

Paralinx LLC

New Pro Video - New and Used Equipment

Technodolly

The Slider

Broadcast Solutions Inc

Rig Wheels Passport

Gamma Ray Digital Inc

Rig Wheels Passport

Willys Widgets

Media Blackout - Custom Cables and AKS

Broadcast Solutions Inc

Wooden Camera

FJS International, LLC

Gamma Ray Digital Inc

Abel Cine

CineLab

New Pro Video - New and Used Equipment

Ritter Battery

CineTape

Tai Audio

Visual Products

Metropolis Post

Aerial Filmworks

The Slider

Glidecam

rebotnix Technologies

Technodolly

Paralinx LLC