This is a simple UV filter. It seems to protect the camera sensor well from UV rays and does not affect the image quality

This UV filter was a great addition to my Tamron 35mm for my Sony. This filter is definitely more of a protector than a modifier, at least in my use case, it helps protect the lens's exposed focusing mechanism and keeps dust or particles out of the lens. Overall I would say this is a great filter for any lens as it creates a barrier between the front element and the world and I have not experienced any negative effects on image quality from having this filter on the lens.

I added this to my Canon Rebel T3i camera. The camera is a few years old and I love it. Cleaning the lens is always a chore, you need to get out the right cloth and be careful not to scratch it! But I can just use my shirt with it. If I scratch it it was $20 and I can get a replacement. I'm really happy with it!

.. and I can't say anything negative. Have several of these for different lenses and never had a glitch

I am still impressed by the devices from K&F Concept. It's well made and the quality of the optical glass and coatings are both really decent. I didn't notice a drop in sharpness.

Optically ok. Compensation good but not perfect. price reasonable.

The filter is very well made, easy to screw in and does not significantly affect the image quality! The packaging, although oversized for a 49mm filter, is also very neat and of high quality.
Unfortunately, the lens hood can no longer be put on because the filter edge is a touch too thick; this is the case with my Sony FE 28mm f2.0. It is therefore unusable for me and is being sent back with a heavy heart.

Protect your lens without compromising the purity of your image! Good value for money. Well made packaging, even once mounted you will not remove them from your lens. I recommend it

Protection filter, which keeps its promises, has been used in the mountains with a zoom lens for two full weeks, and even when it makes rests in difficult lighting conditions, it does not form reflections or “halos”, does not cause distortions at 100 or 400mm, on or two grains of dust need to be removed (on a dirt road, undergrowth and the like).

If you need to buy clear protection for your target I would absolutely buy one of these myself. I tried other brands in the beginning thinking it could save you money but this is not the case, the €10/15 filters don't deliver half the performance of this brand.

This is a great protection filter for an expensive lens. I recently ordered a set of diffusion filters from K&F Concept for one of my lenses and was very happy with the quality of the glass and the workmanship. I didn't hesitate to order this UV filter when it became available. I ordered the 55mm version for a standard Nikkor lens that was part of a DSLR kit. Years ago I used UV filters on my film camera lenses, but I'm just beginning to learn how to use digital cameras. I imagine this might help with some outdoor shots, but I was primarily interested in just protecting my lens. This filter is thin, light weight and very easy to attach to my lens. The optical quality of the AGC glass made in Japan is very high. My images are sharp and I can't see any aberrations in the glass. I appreciate that this filter is shock resistant, water resistant, and especially scratch resistant, as it's surprisingly easy to damage a lens or get it wet or dirty (and they're not that easy to clean). It's nice to keep dust off my lens and not have to worry so much about something happening to it so all I can think about is shooting. I have several other lenses of different sizes that also need protection filters and I will certainly look for this brand. I also like the sturdy storage box that this lens came in. The current price of 32, $99 is a very reasonable price and such a worthwhile purchase so I know my expensive lenses are protected. water-resistant and particularly scratch-resistant, as it's surprisingly easy to damage a lens or get it wet or dirty (and they're not that easy to clean). It's nice to keep dust off my lens and not have to worry so much about something happening to it so all I can think about is shooting. I have several other lenses of different sizes that also need protection filters and I will certainly look for this brand. I also like the sturdy storage box that this lens came in. The current price of $32.99 is a very reasonable price and such a worthwhile purchase letting me know my expensive lenses are protected. water-resistant and particularly scratch-resistant, as it's surprisingly easy to damage a lens or get it wet or dirty (and they're not that easy to clean). It's nice to keep dust off my lens and not have to worry so much about something happening to it so all I can think about is shooting. I have several other lenses of different sizes that also need protection filters and I will certainly look for this brand. I also like the sturdy storage box that this lens came in. The current price of $32.99 is a very reasonable price and such a worthwhile purchase letting me know my expensive lenses are protected. I have several other lenses of different sizes that also need protection filters, and I will certainly look for this brand. I also like the sturdy storage box that this lens came in. The current price of $32.99 is a very reasonable price and such a worthwhile purchase letting me know my expensive lenses are protected. I have several other lenses of different sizes that also need protection filters and I will certainly look for this brand. I also like the sturdy storage box that this lens came in. The current price of $32.99 is a very reasonable price and such a worthwhile purchase letting me know my expensive lenses are protected. $99 is a very reasonable price and such a worthwhile purchase so I know my expensive lenses are protected. I have several other lenses of different sizes that also need protection filters and I will certainly look for this brand. I also like the sturdy storage box that this lens came in. The current price of $32.99 is a very reasonable price and such a worthwhile purchase letting me know my expensive lenses are protected. $99 is a very reasonable price and such a worthwhile purchase so I know my expensive lenses are protected. I have several other lenses of different sizes that also need protection filters and I will certainly look for this brand. I also like the sturdy storage box that this lens came in. The current price of $32.99 is a very reasonable price and such a worthwhile purchase letting me know my expensive lenses are protected.