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I finally figured out how to work on this shutter so I thought I'd pass along wh at I've learned. Procede as follows, and don't loose anything:

1. Unscrew the front and rear lens elements. Set...

I recently acquired a 105mm f/4.5 Carl Zeiss (Jena) Tessar in a rim-set Compur ( 1-250, T & B) shutter (no flash sync). From the markings on the lens and shutter and the style of lettering, I think...

Thanks for the help, Marv. Following your advice, I retried removing the front component. As you suggested, I had to extend the bellows much more than I was e xpecting in order to achieve focus. I...

I recently purchased an older Schneider Convertable Symmar lens. It is marked 1 80/5.6 and 315/12. According the the serial number, it was made about 1971 and is all black.

The salesman told me...