Set of filters for contrast control of variable gradation photo papers.
Filter sets for contrast control of variable gradation papers are supplied in a square design (8.9 and 15.2 cm) for the internal sockets of the instruments between the light source and the film. They contain 12 filters which are numbered from 0 to 5 in 0.5 increments. The number 5 corresponds to the highest contrast, 00 is the softest. When changing the contrast it is not necessary to think too much about changing the exposure all filters from 00 to 3,5 have the same exposure, filters from 4 to 5 exactly double.
Reference: 51681324
Reference: ptr00035
Brand: Paterson
Reference: 1673505
Brand: FOMA
Reference: 90431626
Reference: 90420318
Reference: ptr00036
Brand: Paterson
Reference: ptr00039
Brand: Paterson
Reference: ptr00034
Brand: Paterson