Prinzflex — 100-200mm f/5.6 constant-aperture manual zoom lens, M42 and SLR mount fits
The Prinzflex 100-200mm f/5.6 is a constant-aperture telephoto zoom sold under Dixons' Prinzflex house brand during the 1970s and 1980s. Sitting below the faster and pricier Prinzflex zooms in the range, it was aimed at budget-conscious SLR owners wanting a compact, lightweight tele-zoom option.
Weight, filter thread and minimum focus figures were not consistently documented across the mount fits Dixons sold this lens in, so exact numbers are omitted rather than guessed. The lens holds f/5.6 through its zoom range, with a manual zoom and focus collar, click-stop aperture ring, and a lighter barrel than faster Prinzflex tele-zooms.
The modest f/5.6 maximum aperture keeps the lens small and inexpensive but dims the viewfinder and limits low-light handling compared with faster designs. Holding a constant f/5.6 across the range at least keeps exposure predictable while zooming.
These turn up cheaply secondhand, often as an accessory lens with a Prinzflex SLR kit. Check the zoom action for smoothness, the aperture blades for oil, and the glass for haze given the age of most surviving examples.