Well, there should be aperture leaf pins in those holes. But it's hard
to imagine they could come adrift. Has this lens ever worked during the
time you've owned it?
Chuck Norcutt
Tom Fenwick wrote:
> Interesting... I've been in that way now, and everything seems ok
> with the levers under the cam ring.
>
> I opened up another sample (non-functional for other reasons, but with
> working diaphragm) and the only difference seems to be further in.
>
> Down near the rear element, looking from the front, there is a ring
> with six notches that turns when the stop-down lever is moved. On the
> working sample, these notches each have a pin in them - I guess one
> for each aperture blade, but on the non-working sample the notches are
> empty. Could all the leaves have come adrift somehow? It almost
> looks as though they just aren't there!
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