Michael Heald
20-Jan-2008, 07:54
Hello! I have an 8x10 pinhole box camera with a FL=12 inches. I've been toying with the idea of dividing the 8x10 film area into four 4x5 spaces, use dividers, and have four pinholes on the front of the box. I would then use filters to give LRBG exposures.
The trouble is registering the resultant four 4x5 negatives, since the negatives would be separated by 5 or 6 inches and parallax would come into play.
For a distant point at infinity, how close can an object be before parallax would cause the objects not to be able to be registered, given the diffusion circle of a pinhole camera?
Alternately, after digitally scanning the negatives, each RBG exposure can have numerous registrations on the Luminous negative for points that are different distances from the camera. Is there a way to subtract the unregistered parts at each registration, then sum th eregistered parts, so that the resultant negative would be completely registered on the L or Luminous negative?
Thank you and best regards.
Michael A. Heald
The trouble is registering the resultant four 4x5 negatives, since the negatives would be separated by 5 or 6 inches and parallax would come into play.
For a distant point at infinity, how close can an object be before parallax would cause the objects not to be able to be registered, given the diffusion circle of a pinhole camera?
Alternately, after digitally scanning the negatives, each RBG exposure can have numerous registrations on the Luminous negative for points that are different distances from the camera. Is there a way to subtract the unregistered parts at each registration, then sum th eregistered parts, so that the resultant negative would be completely registered on the L or Luminous negative?
Thank you and best regards.
Michael A. Heald