After X-test reports at home and abroad, according to x-times ask what use befriended photographer, I opted for Hoya HD filters. Is scheduled with me on all lenses and remains on it. I could not, under any lighting conditions notice a decrease in image quality - in return but not they would be better. The trade press has this different opinions as to whether it makes sense, the UV filter to use. I say yes - as a lens protector for the original lens and because it is easy to clean, in fact. Held camera over the fence and the naughty little goat licked the lens ?? No matter - breathe - with Differed microfibre cloth - on we go .. On vacation with the sweaty fat fingers come on the lens ?? No matter - breathe - departed - on we go. Even with an award-winning Hahn has hacked my Macro on the filter - no matter ...