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crazeazn wrote:
... to separate the helicoid but ...
I didnīt opend my Rokkor 58/1.2 that far, need only to convert the mount.
But from other lenses I cleaned the iris I learned that one not every time need to separate the helicoid.
Too open that is easy, too put it together is sometimes hard, and do put it together the way infinity and iris coupling work is even harder.
Sometimes (!) it is sufficient to several times clean/open/close the iris with isopropanol alcohol or something similar, without disassembling the whole aperture mechanism.
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