4 designs
Optics
The lens and the frame: f-stops drawn at their true size, what each focal length sees on 35 mm, the film formats from half frame to 4×5 in, and f/8.

5 pieces
4 designs
The lens and the frame: f-stops drawn at their true size, what each focal length sees on 35 mm, the film formats from half frame to 4×5 in, and f/8.

5 pieces