K&F CONCEPT 77mm MCUV Lens Protection Filter 18 Multi-Coated Camera Lens UV Filter Ultra Slim with Cleaning Cloth (K-Series)

Got it for my EF-S 55–250mm f/4–5.6. Worth It.🔒 Protection:I shoot outside a lot- car shows, dirt, pollen, flying bugs with attitude, and this thing’s been a great first line of defense. I'd rather clean or replace a filter than risk scratching actual glass. Bonus: no anxiety wiping it with a t-shirt if I have to.🌞 **Optical Clarity:**No weird color cast, no ghosting, and it hasn’t affected sharpness at all—even at 250mm. I was worried it might dull the image, but nope. Photos still come out crisp and contrasty. (note I have to stop this lens down to like f8 anyway as its pretty soft at 250)📦 **Build Quality:**It’s super slim, threads on smoothly, and doesn’t feel like the bargain bin trash you sometimes get with cheap filters. Doesn’t get stuck, doesn’t rattle, and doesn’t look like a toy.⚠️ Important Note: (I used an EMOJI, so you better read this!!!)CLEAN YOUR LENS WELL BEFORE PUTTING THIS ON.It threads on fine, but trust me, you don’t want to keep taking it off and on.Put it on once and leave it.Any dust, fingerprint, or oil on the front element WILL show up in your shots like a nasty watermark you didn’t ask for.Treat it like applying a screen protector, clean, then cover and LEAVE IT ON.Bottom Line:If you’ve got the 55–250mm or any 58mm filter size lens, grab this. Cheap peace of mind, no image degradation, and it saves you from the heartbreak of scratched glass or sneeze damage mid-shoot.

GREAT Lens Protection Kit, Real Good Polarizer Lens, Color, Good Functions, Filter, Keeps It Dust. Highly Recommend

This was the very first filter I bought for my kit EF-S 18-55mm lens, and it worked really well starting out. I wasn’t totally sure what an MCUV filter did at first, but I noticed it helped keep my images a bit sharper and definitely protected the lens from dust and accidental bumps. It stayed on my lens until I upgraded to a sharper, more versatile lens. Solid choice for beginners looking to protect their gear without breaking the bank.

Fits well and adds protection without interfering with images.

I think the K+F Concept Nano-K is a good value for casual shooters wanting protection from the elements, pets and fingers. Not much image degradation compared to B+W or Hoya HMC and (with microfiber cloth) sea spray and sand are easily wiped off.However, the knurled "non-slip" ribbing on the filter ring prevents some of my lens hoods from attaching to the camera. The HB-6 for the Nikon 24-70, for example. Not a huge deal but have never experienced this in 40 years of photography.And I want to relate an experience which does NOT affect the rating but is going to make me reconsider using K+F filters. Today, I dropped a lens onto concrete from chest height. It's been a couple decades but I've done this a number of times. Previously, every time the filter hits the ground first, the filter shatters and the ring deformed. B+W, Heliopan, Hoya, Tiffen behaved similarly. Today, the K+F filter (pictured) did not shatter nor become deformed and I believe it transmitted more force of impact to the lens than if it had shattered. The focus ring of the AF-D lens is so stiff it will no longer autofocus.

Very nice, high quality filter that fits perfectly with the K&F step up ring. (The Amazon basics filter did not fit at all, don't understand what happened there.) These come in a very nice plastic box with a quality foam insert, a microfiber lens cloth, etc. And it's made of optical glass - lots of filters out there at this price are plastic - "resin" - so read the descriptions. A quality item, perfectly and professionally packaged and presented.

My camera lens is protected and dust free.Easy to clean no scratches.I can't not compare it to another that similar I just have this one.So far it's keep my camera lens protected no complaints.

I use these and sacrificial lenses for some NVGs. Nice quality and clear lenses. I absolutely recommend these for protective lens usage.