Originally Posted by
AtlantaTerry
May I ask where you found the lens and do they have another?
As for apertures, is there a filter thread on the front? If so, try some screw-on Step Down Rings to reduce the amount of light coming in. If that works, then get a couple more Step Down Rings in smaller sizes that work with the largest one.
Do some tests to figure out what the working aperture might be and you are set to go. One trick to try is to use a light meter on the ground glass, then add one of the smaller rings and measure again. There is your light loss. It's not highly scientific but you don't run the risk of damaging the lens, either.
BTW, filter companies such as Lee and Cokin make really large adapter rings so if you have filter threads, those companies might have something you can use.
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