Prinzflex's M42 wide-angle — the budget 35mm f/2.8 for screw-mount cameras.
Prinzflex was a house brand name used by department stores and mail-order companies (notably in Germany and the UK) for photographic accessories and lenses. The 35mm f/2.8 Auto Reflex M42 is a wide-angle prime for the M42 screw mount, likely manufactured by a Japanese OEM producer. The Auto Reflex designation indicates standard auto-aperture functionality.
35mm focal length, f/2.8 maximum aperture, M42 screw mount, auto-aperture operation.
Prinzflex lenses are broadly equivalent to other budget-tier M42 lenses of the same era in optical performance. The specific quality depends on the OEM manufacturer, which is typically undocumented. These lenses are primarily attractive as low-cost M42 glass for adapted use on modern mirrorless cameras. Optical quality at f/5.6 is generally acceptable for everyday use.
Inspect for fungus, haze, and coating condition. Confirm M42 thread engagement is clean. Test auto-aperture mechanism. Check aperture blades for oil contamination.