The clockwork lens: Lensrentals tears down famed Minolta 40-80mm F2.8 Gearbox Zoom

Lensrentals tears down famed Minolta 40-80mm F2.8 Gearbox Zoom

Photograph by Tom Leonard

The Minolta MC Rokkor X 40-80mm F2.8 zoom is a unique lens, which uses a gearbox for controlling focus and zoom. The advantage of this design? It's pretty small for an F2.8 zoom, especially one made in the 70's, and more precise than a conventional helicoid. The downside? It's fiendishly hard to take apart – as Roger Cicala and Aaron Closz at Lensrentals recently found out...

Lensrentals tears down...

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