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Quick and not representative sharpness test with and without UV filter

Quick and not representative sharpness test with and without UV filter

Had this little argument with my friend Tilo who claimed that using a UV filter on your lens will make the images less sharp and generally be bad. So I made a little comparison shot. Left is with UV filter and right is without. Looks pretty identical to me. So if the UV filter is affecting image quality it is under some other circumstances, which are probably pretty rare. If anyone has some suggestions on how the influence of the filter can be made visible, please comment!

Left: UV filter attached, right: no UV filter attached

Full resolution images can be seen here and here.

UPDATE: Used some Google-Fu to see if there are other people wondering about the same thing. Some interesting results came up. The overall statement seems to be: UV filter is theoretically affecting the image quality, but in 99% of the cases this is not noticeable. In very extreme light conditions the effects can be visible though.

Now for some finer points:

Apparently this is a topic that is often discussed, and as always in these cases many people just repeat what they have heard from “someone” without really having the facts to back it up. Personally I will do some more comparison tests to better know in which situations the filter could affect my images in what ways, so I can decide when it will probably be better taking it off. The main reason why I prefer a UV filter for lens protection is space constraints in my camera bag.
Posted in Photography.

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