An old Nikon wide angle lens was obtained the other day, AI Nikkor 28mm/f3.5 model as clogged helicoid junk at only one yen as a void. After arriving at hand from Yahoo seller, careful checking with no desire revealed that no fatal defeat except small mold on the outer side of frontal glass surface and sticked helicoid, no historic used ugly ware. Engraved letters on the focus ring were clean and clear like new. Deep consideration to recover it's performance led me to put it on the electric room heater for a moment, of course removing rubber ring. As a matter for surprising focusing ring started to move so gradually, grease adhesion was released safe. It proved that it could be continue without disassembling. Though I had no information about this lens, actual test shooting showed excellent result in atmospheric resolution. I have been paying attention only on Minolta MD 28mm/f2.0 and 28mm/f3.5, but this Nikon new comer would be a good partner.
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