SMC Pentax 500mm f4.5 for Pentax K film holder 8 is a relatively compact

8 is a relatively compact (but dense) zoom lens for the Nikon F mount

Canon PLC-52 drop-in circular polarizer for most Canon L-series telephoto lenses with IS function (check your lens instruction manual for compatibility

fast f4 constant aperture

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SMC Pentax 500mm f4.5 for Pentax K film holder 8 is a relatively compactThe SMC Pentax 500mm f4. 5 is a big, heavy lens: it weighs almost 3. 5kg and measures nearly 44cm long. It is not the sort of lens that you pack in your bag just in case. But it has a handy built in tripod mount, a "gunsight" for general aiming, and image quality is solid. Fun fact: this lens technically has an interchangeable mount, which can be switched between M42 and K mounts; only the K mount is included here. Cosmetic condition is excellent,