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Odd (Early?) "Micro Tamron" 70mm f5.6; Any Info?
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PostPosted: Fri May 12, 2023 4:25 am    Post subject: Reply with quote
aoleg wrote:
I've seen a similar arrangement with two sets of aperture blades on some Russian lenses, notably Helios-40. I, too, think it's excessive overengineering; it seems the designers used this arrangement to provide for linear movement of aperture control ring (that is, to keep ring travel the same between, say, f/2-2.8 and f/11-16).


I briefly had a Zeiss Planar 110mm f/2 for Hasselblad with a double set of aperture blades.
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