Hello. I find that this zoom focuses better when I zoom the lens out to 105, focus, then zoom wide. It always stays in focus. I find that if I focus lets say at 50mm then zoom out to 100mm, I have to refocus. Has anyone else experienced this? I do find this lens to be a very sharp zoom. I took it to NYC on my LX, mostly using a tripod, and was very impressed with the results. Thank you.
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