Canon 100-400L II & UV Filter
RS_RS
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Senior Member
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Posts: 1,788
Re: Canon 100-400L II & UV Filter
Lemming51 wrote:
Still, there is very rarely a need for a "protective" filter, and no need at all for UV with digital sensors that don't produce the excessive blue reaction to UV that film did. It cannot improve lens performance and offers less protection than the hood, so why bother?
IMHO, YMMV
My mileage does vary. I always use both a hood and a protective filter on my lenses. I have done many comparative tests with the filters I use and never seen any difference in IQ with or without the filter. But what I have had to do many times is clean the filter. I would far rather do that, and even discard a filter and replace it, than have to clean the lens. Obviously adding a filter can cause loss of IQ in principle, and if it is a poor quality filter, or a poor copy of a reputable filter, this will happen in practice, but I think everyone has to be guided by their own experience of what works best for them.
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