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collimating mark

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An index mark, rigidly connected with the camera body, which forms an image on the negative. This image is used to determine the position of the optical center or principal point of the imagery. Also called fiducial marks.

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Colliflower
colligate
Colligation
colligative
collimate
Collimating eyepiece
Collimating lens

collimating mark
Collimation
collimator
Collin
Colline
collinear
Collineation
Colling

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