39mm 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 IS. 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.

Got it to put on Nikor 50mm lens. Fit perfectly. Great filter for the price and not bulky. I have owned filters from this brand and haven’t had any issues. Easy to attach and durable.

I purchased the 46m version of this UV filter for a Nikon Z series lens. I can confirm the glass is coated to reduce glare, and it does seem to work fairly well, especially compared to an uncoated filter I was using before. The build quality is good and there are extra rugged grips on the sides, which help if the filter gets stuck while being unscrewed. For the price this is a great value, and I'll probably get some additional sized for other lenses.

This is a very nice filter. I am used to those cheap UV filters, but this one seems much more premium. It fits my lens like a glove and provides an extra level of protection in addition to the hood. The price is right and the build quality matches that of the lens (18-135 canon) perfectly.

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.

Highly recommend this filter. Perfect fit and very good UV protection

Good to protect your lens. Looks good quality.

I'm thoroughly impressed with the K&F Concept MCUV Lens Protection Filters. The build quality is exceptional, with a sturdy metal frame and scratch-resistant coating. The filter is ultra-slim, making it perfect for use with a variety of lenses. The Multi-Coated Glass Provides excellent protection for your lens while minimizing reflections and flare The Ultra-Slim Design Fits perfectly on most lenses, reducing vignetting and improving overall image quality. Scratch-Resistant Coating actually works. Easily cleanable leaving a streak free CLEAR image! This filter performs flawlessly, with no noticeable impact on image quality. It's perfect for protecting your lens from dust, moisture, and scratches. I've used it with my vintage Canon FD lenses AND my LUMIX PRO lenses! They are INVISIBLE to your sensor!!! Considering the price point, this filter is an absolute steal. It's an affordable way to protect your valuable camera lens without compromising on image quality. I now use these on ALL my lenses!