This lens has a center filter (yellow) and consists of 2 parts that appear to be the same.
Looks like a topogon design.
it has no aperture.
I am trying to mount it on a Linhof Kardan boardto use on 5x7 and need some machining to be done so as to keep the mounting distance correct by using the original mount. I think some kind of shutter was fitted between the elements originally.
Anyone used/seen one of these old aero wide angles. I got this many years ago.
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