Do you always have a filter on your lens?

Started Aug 16, 2011 | Discussions thread
Godfrey Forum Pro • Posts: 29,327
Re: Rich - to answer your question abut focussing

HEL000 wrote:

No I have never experienced any trouble with focussing whilst having a UV filter on the lens...............despite what I read hear with all the pros and cons, I will be continue to err on the side of caution and maintain the use of UV filters on every lens, as well as a lens cap!

I've seen minor AF focusing errors with a variety of lenses once a filter was added. Canon 20mm, Pentax 28-105, Canon 300mm, and Nikon 17-35 are the ones that I remember best. In all cases, removing the filter (I tried several) solved the mis-focusing problem.

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