This K&F Concept 77mm UV filter is a good accessory for your expensive camera lenses. It protects the front element from dust and scratches - or in my case flying mud at motocross events. The filter fits easily on to all my 77mm filter threaded lenses, and comes with a centre release K&F lens cap too. The lens cap also has a cap keeper if you want to avoid loosing the lens cap.

What I like about this filter is the thickness - or lack of it - as it's 3mm thick and that means it doesn't appear to darken the corners of the frame even on the wide-angle lenses I tried. I used it on my 16-35mm lens and there was no visible vignetting with this filter, and that does happen with thicker filters. The multi-coating must be rather good too as I did not see any evidence of lens flare even without a lens hood and the sun in the edge of the frame.

The UV blocking capabilities are not needed these days for digital cameras as the image sensors have a UV filter on them, so you won't see a change in the colour cast as described in the product info.

The filter comes in a good protective box, and also includes a microfibre cleaning cloth.

For the price this is a good value lens protection filter.