Was drawing a blank on some words when I wrote my last post.
Words that are hiding from me usually appear as soon as I hit the
send button.
They are flange and retaining ring. Some shutters have a
thing which will work both ways, as a retaining ring when mounted
with the flange on the back and as a flange when its mounted on
the front with screws. Press camera shutters often have just a
retaining ring for rear mounting. Works fine as long as the lens
board is not too thick. Shutters with lock pins are generally
mounted using a retaining ring on the back. In fact, the pin may
not clear a flange meant for front mounting. Sometimes a flange
will be used as a retaining ring on the back and also screwed
into place. Where this is done and the shutter also has a lock
pin the result is a very stable mounting. I've found thi on
Speed/Crown Graphics with Kodak shutters.
I have also seen a few shutters which were glued with thread
locker, a PITA.
--
Richard Knoppow
dickburk@xxxxxxxxxxxxx
WB6KBL
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