Hello! I have a Gundlach 12" Radar 8x10 that I just had CLA done on the Betax #5 shutter, and have it mounted on a board. I'm curious about using filters on this lens, since I shoot a relatively fast film (Tri-X 320) and the fastest shutterspeed on the shutter is 1/50th. I like the quality of blur that I see in out of focus areas in the image, so I'm planning on using this lens at f4.5 quite a bit on my 8x10. I'm guessing that I'm going to need an ND filter for times that there is just to much light. How would I go about doing that for a lens with no threads?
There are threads on the rear element, my 77mm filter is just slightly to small, so I assume the rear threads might be 78mm? I don't think I've ever seen filters in that size before.
Anyway, what's the best/easiest way do have an ND (or even a color filter) on a lens like this? The front element is roughly 80mm wide. If I had a square gel filter, I suppose I could just tape it (or hold it) up to the lens, I don't think I'd like to always do this though.
Any thoughts?
And on a side note, anyone know anything about this lens? Gundlach 12" Radar 8x10 I can take a few pictures of it if that would help anyone remember anything about the lens, like when they were manufactured? Just curious really :-)
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