500 mm telephoto lens Overview Does anybody know this lens? Kalimar 500mm f/8 preset: Just ... The Kalimar 500mm is a classic, affordable, manual-focus mirror (reflex) telephoto lens, known for its compact size and significant reach, using a T-mount system to adapt to various SLR/DSLR cameras for nature, wildlife, and moon photography, though its fixed f/8 aperture and mirror design create challenges like 'donut' bokeh and require tripods for sharp shots due to manual focus/exposure and inherent shake. Model K9013984
