Nikon 55MM F/2B instruction manual

Reproduction ratio is the relation of the image size to be recorded on the film to the subject size. For ex- ample, if the image on the focusing screen is one-fifth the size of the subject, the reproduction ratio is 1:5, and this is indicated on the reproduc- tion ratio scale on the focusing ring by the figure 5.

Focusing at predetermined reproduction ratio

In front of the distance scale are two reproduction ratio scales engraved in orange. The inner scale with figures from 1:10 to 1:2 represents values obtained when the lens is used alone, while the outer scale with figures from 1:2 to 1:1 represents values obtained with the PK-I3 ring. Using either of these scales, you can photograph a subject at a predetermined reproduction ratio without any complex calcu- lation. To photograph a subject at 1:5 reproduction ratio, for example, just turn the focusing ring so that the figure 5 on the reproduction ratio scale aligns