This is a very near mint multicoated 40mm f:4 Zenzanon MC for the older Bronica EC, S2 and S/D cameras. This is an amazing lens, 9 aperture blades, very small and light and takes 67mm filters like most of the other Bronica lenses. The glass is clean, clear and unmarked front and rear. Very sharp with good contrast, at least the equal of the Nikkor 40mm and 1/4 the size (the Nikkor takes strangely sized 90mm filters that don't seem to exist anywhere).
$400 plus $12 shipping.
Pictures here:
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