I have just picked up an old xenar 180mm lens, serial number 2128675 with a red triangle, in a dial set compur #2 shutter.
The glass appears very clean, and the shutter seems to work fine, but it doesn't seem to take 49mm filters. They seem to start in the thread, then jam after about half a turn.
Is the thread non-standard, and can I get an adapter to take normal (modern) filters, or do I need to use series 7 filter adapters with this lens?
Thanks for any advice.
Bruce
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