Posted: Wed Oct 22, 2008 11:11 pm Post subject: |
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sichko wrote:
The lens is 22 years old. The "grease" used to lubricate the focussing helicoids can degrade during that time, particularly if the lens is not used regularly. You can try turning the focussing ring back and forwards many times. If this does not help, and the focussing still feels stiff and uneven, you may have to dismantle the lens, clean the helicoids and regrease them. But this is another story ..... _________________ John |