If your lens is accelerated by gravity in a downward direction and it encounters a rock, the rock will have the right of way, as witnessed by me this past weekend. Now the glass of the rear element has a nice chinger, well, not really nice. It looks quite like the piece of granite it hit.
Are rear element assemblies available anywhere? I know Nikon is out of the LF lens business. Where are the lens junkyards?


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I may be able to help--pretty sure I have a couple of Nikkor 210mm cells. It says machinist under your name--could you make me a couple of flanged retaining rings in exchange for the set?

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