Paterson micro grain focus finder for enlarging photographic Paper Prints[BDL]
The Paterson Focus Finder is an inexpensive but reliable laboratory instrument.
The 8 x magnification is more than enough for sharp focus.
Allows focusing on the grain of the negative, image is bright and clear and you can see where you are in the picture.
The focus finder also has a diopter compensation adjustment for individual eyesight. #
There is a shutter to protect the mirror when not in use and a rubber cap to protect the lens.