It was a prototype, or maybe a pre-production sample, of the world famous telephoto lens that launched the Pentax Star series. What makes this lens different at first sight is it bears no Star symbol. Specifications: 7-group 8-element construction featuring low-dispersion glass, Minimum aperture f/32, Minimum focusing distance 4m, Size: 84x132mm, Weight 820g, Filter diameter 77mm.

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