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    Re: Lens Shutter Test?

    If you have an inclination towards DIY, you can build a very straightforward tester using an Arduino and a few small parts for under $20-

    https://youtu.be/UwOh3da_Y8s

    The video is super goofy...
  2. Re: Removing the Rear Element on a Caltar HR 90mm f8 (Geronar WA)?

    Yes I did, unfortunately no luck. The outer slots hold the lens retainer (which is loose), the inner ones seem to hold the rear glass element into the rear element assembly but are as frozen as the...
  3. Removing the Rear Element on a Caltar HR 90mm f8 (Geronar WA)?

    On a bit of an impulse I picked up a Caltar HR 90mm f8 (which is a rebadged Rodenstock Geronar WA) from eBay hoping to get a lens that would be a little more friendly to work with on my Super Graphic...
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