I have recently come into posession of a 24-piece universal Lithograohic Optical Collimator Set consisting of an adjustable spacing column, 3 pressure sensors on arms, 17 threaded lens collars, threaded lens rings, non-threaded spacers, etc. Seems like the old lithographic equipment are becoming increasingly rare. Does anyone know how these work or where I can find out? (Sorry if I am asking on the wrong forum.)

Hal