TRICHROMY
Another day, another strange lens to add to my growing collection. The PZO Janpol Color-K 55/5.6, is a Polish enlarger lens, with integral colour CMYK filters built in. I had first seen this oddity online, possibly in the hands of an inspirational french experimental photographer - Mathieu Stern . Stern first came to my attention many years ago, when I began to use projector or found lenses on my camera, to achieve various effects. He has recently written an ebook on the use and customisation of projector lenses, but is very active on social media, especially Youtube, with his weird and wonderful techniques. The Janpol lens is a 55mm with a max aperture of 5.6 and a minimum of 16, with three stops. On each side is a knob which when rotated, moves an internal colour filter into position. The knobs have gradations of effect and can be used in tandem. It dates from 1965 and was intended for enlargers using 35mm film and also for copy work. The standard M42 mount meant it was a...