I think i have 165mmS.A. F/8 lens in a seiko sutter, high speed is 1/400 sec.. I need a jam nut(retaining ring) for it, would also like to find source for 105mm filters which i think fit the lens. Can you help me to find source for these it ems.Would like to know if 165mm SA made in mid to late 60's was coated.
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