| 摘要 |
PURPOSE:To eliminate an unnecessary blank part and to save photographic paper by slanting the optical axis of exposure of each mounted printing lens to a printing image plane according to the size of the image plane. CONSTITUTION:A printing lens 13 for L size is inserted into the exposure system in a mount 20 to expose a film P through a mask, and then the film is fed laterally while a blank part R with specific width is left to repeat the exposure. When the lens is replaced with the printing lens 12 of small power for S size, there is the deviation of distance (e) between the optical axes of the two printing lenses, so the optical axis of the lens 12 is shifted right and the front edge of an S-size image plane S1 is set at the position of a front line where an image plane LN+1 is printed. Consequently, the waste of the formed blank part is eliminated by varying image size to utilize the photosensitive paper effectively.
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