Originally Posted by
Mark Sampson
The "convertible" Symmar lenses were made from the middle '50s until around 1972. They are fine lenses; I used several on the job years ago. You remove the front group to convert the lens to 500mm. That will require more than 500mm of bellows extension to focus, and the general opinion is that the long focal length is not as sharp as the complete optic. I would say "try it and see". The ones I used had standard Compur shutters, if the electronic Compur works, that's great.
Enjoy using your lens, and share some photos with us when you have some. Best of luck!
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