I noticed no difference in quality of my photos after I took this. I did take a lot of great photos after it was installed but I'm not sure if this cover would have much to do with that as I'm using it to simply better protect my lens.

I really love the quality, this screwed on my camera lens just fine (the very tip) without issue and I appreciated finding out the size was based on that little 0 symbol on the front of my lens. That's how I figured out I needed 67 mm.

Overall, really happy.

I purchased the 77mm version of this filter to protect my Olympus 300mm Pro lens. While in Ecuador doing bird photography I was having issues using this lens. All of the photos were out of focus. I had used the lens 2 weeks earlier and the images were tack sharp. I had to throw out an entire days worth of work because every image was bad. I put the lens away for the rest of the trip thinking then lens went bad. Well I got home and started testing the lens. I discovered that with the filter all of the images were fuzzy. So I removed the filter and all of the images were tack sharp. So be very careful using this filter at least on Olympus cameras and lens. I have since put on a B+W filter and it works perfectly.

I put something on all my outdoor lenses to protect them, and I like to use a UV filter to cut a little of the normal haze shooting in beachlike settings. I usually use something pricier, but decided to try the K&F Concept 52mm MC UV Protection Filter.

It arrived in a slightly wider than normal filter box. The box was slightly larger because the filter was packed in a latching plastic box with foam protecting the filter from damage. I looked at the filter under a magnifying light, and it was flat and smooth with no scratches or oddities. It fit my 45-150mm lens perfectly, and it really is a low profile filter. It doesn't seem to affect lens sharpness, doesn't affect clarity, and I'm pleased with it.

I'm quite happy with this UV filter. Is this filter as good quality as one of my $50 B+Ws? Possibly not, but on the other hand, the B+Ws cost over twice as much, and you'd have to be a pixel peeper to notice the difference in image quality. Viewing my pics at 100%, I'm satisfied.

Both lenses are Sigma lenses with 2 different brands of UV filters on them. The lens on the left is my 150-500mm with a different brand filter. On the right is my 150-600mm lens with the K&F filter. The left lens looks a little blurry, while the K&F filter does not. Doesn't reduce image quality that I can say. You can feel it's weather sealed, but I don't test it to see if it really is. Comes in a plastic case No complaints so far.

You never want to be without protection so its a good idea to always have an extra UV filter on hand! I have a couple others K&F including UV and polarizer and have no problem recommending. I saw no anomalies, flares or distortion. I would like brass mount but for the money these are perfect.

Today most of the benefit of a UV Haze filter is to protect the front element of a camera’s lens. There is some haze correction too but the film need for blue reduction isn’t a case with digital cameras. The bigger reason is that post processing software today has the ability to filter as much haze as the photographer wishes which is something no UV filter can do.

The need for protection is real. Even if it means keeping your lenses’ front elements from getting dirty or splashed, these filters play a role. I had this filter on when I took a misstep and splashed into a small river soaking the camera. I felt a good deal better about my clumsiness knowing that I’d not have to face the delicate job of lens cleaning when I got home.

However, a filter in the light path needs to be of high quality or it’ll degrade the image. I am far from having a lab where I can test glass here. The best test I thought up was simple. I’d take an identical image with and without the filter on and then compare to see if I caught any issues. Yes, it’s crude but it’s what I have.

Please see the included image. To create this, I placed the camera on a tripod, set the exposure manually as a best guess and then snapped two images – one with and one without this filter. I took the RAW images, arbitrarily cut a chunk from one and pasted it on the other. Both are labeled. I then compared the two concentrating on the area where they were joined. I’ve drawn a black line at the approximate location of the join. I did no post processing of any sort. These are the RAW (DNG) images directly from the camera only converted to JPEG for posting here.

I did my best pixel peek at both images finding no distortion whatsoever from this filter. In other words, it does just what I want and now has earned a place on my lens.

I install a UV filter on all my lenses. Turns out my 70-300 was flying naked!! So I opted for this 67mm filter to protect the front elements. I do a lot of travel shooting as well as weddings and protection from bumps and such is key. It's far cheaper to replace a filter than a whole lens! This filter element offers a neutral pass-thru while protecting the front glass and threads of the expensive lens.

Recommended!

use the K&F UV filter on all of my lenses to protect them from external influences. This means that the glass can be quickly cleaned outdoors without any worries (without high-quality cleaners/worrying about scratches). If it does get scratched, I'd rather buy a new UV filter than a €2,000 lens. As I already mentioned, I use the K&F UV filters on all of my lenses because I'm really happy with the quality. Pros: -Value for money -No loose glass -No rattling -No extremely thin glass that's prone to breaking -Lens hood fits -Slim -No change in image quality (RAW) -Lens cap fits -Box included when not in use I use the K&F UV filter on all of my lenses to protect them from external influences. This means that the glass can be quickly cleaned outdoors without any worries (without high-quality cleaners/worrying about scratches). If it does get scratched, I would rather buy a new UV filter than a €2,000 lens. As I already mentioned, I use the K&F UV filters for all my lenses because I am really happy with the quality.

very good, high-quality product! Flawless glass without annoying reflections. Precisely fitting thread. When it rains, the water beads off nicely. The filter is therefore also good for outdoor use. Even with my 10mm wide-angle lens, no vignetting was noticeable. The filter was delivered dust-free in a nice protective cover. Silm simply gives you a smaller surface to grip, you can easily remedy this by using rubber bands/Tetra band and increasing the friction to unscrew it. If that doesn't work either, I put my lens out in the cold (if it's not cold, then in the fridge) the material contracts and I repeat the process, it has always worked so far.

Great UV protection filter that doesn't add anything to your photos. No color shift, no blue cast, no blurring ... nothing. Just a crystal clear UV filter to give you piece of mind that your lens is protected. The slim design is nice because it doesn't produce any vignetting. Can't beat this quality!