Hello all,
I used to be the proud owner of a Zuiko 300mm f4.5 It was an incredible
lens, but a bit slow for my wildlife work. I used it 2 years ago in
Churchill to shoot polar bears in sub-zero temps. All of the sudden, the
focusing mechanism froze(?literally?) completely and I could not move it.
Since it was the only telephoto I had with me at the time, I forced the
focusing ring until it finally loosened up. The lens worked OK afterwards,
but had problems with the aperture ring sticking from then on and I sold it.
I would like to get another one for lightweight backpacking trips(it was
sure a lot lighter than a 300mm f2.8!!), but wonder if anyone knows what may
have happened to make it lock up. I wonder if the lens lubricant froze(it
really was that cold!!), or maybe condensation got into the mechanism and
formed ice. I wonder if an internal focusing lens would avoid this problem.
Ron Crabtree
Santa Fe, NM
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