needed to protect the lens on my FZ300 and this filter has some good reviews. The overall quality seems very good and the packaging works well when it's larger than necessary. The filter threads well without affecting hood fit, stows or deploys upside down and shows no vignetting at 25mm. There doesn't seem to be any noticeable degradation in photo quality. The glass seems to attract dust and had to be cleaned several times before I could attach it to the camera with no particles on the inside. The outside needs frequent brushing. I'll update if I find more issues in the future, but this filter seems like a good buy.

I needed to protect my FZ300's lens and this filter has some good reviews.
The overall quality seems very good and the packaging works well, if larger than needed. The filter threads on nicely without impairing the hood fitment, reverse-stowed, or deployed, and doesn’t show any vignetting at 25mm. There appears to be no noticeable impairment of the photo quality.
The glass does seem to attract dust and needed several cleanings before I could mount it on the camera without particles on the inside. The outside needs brushing off frequently.
I’ll update if I find any other issues in future, but this filter seems a good buy.

Exactly as described

fine

bought this for a rarely used camera. It's still a valuable collector's item that I want to keep in excellent condition and that means I had to protect the lens. I only have filters with the Zeiss "T" coating made of German Schott glass on the cameras that I use a lot because I think they are the best multi-coated filters I can afford, but I can't spend the money on them spend on a camera I rarely use. Any camera that is threaded to accept a filter deserves the protection that comes with a filter mounted in front of the actual camera lens. I would rather risk damaging the AR coating of a filter that can be easily replaced than risk damaging the actual lens on one of my cameras through cleaning and exposure to dust or chemicals in the air. This brand of filter came carefully packaged and the filter holder that comes with the filter is well designed and provides excellent protection for the filter when it is not on the camera lens as I am using a different type of filter. This filter has multiple AR coatings on both sides of the filter and after comparing the results of identical images taken with the same camera using this filter and one of my prized and now unaffordable Zeiss "T" filters, I can say I see no difference can the results. I'm sure an optical lab could document some differences, but in the real world I can't see any differences when comparing the test images I took with this filter and the Zeiss filters I've used. This design works so well that I am slowly replacing the older non-Zeiss filters I have on my older lenses and cameras with these newer designs.

I have no complaints about these filters. I run them on all my walkabout lenses that are carried around. Flare resistance is very good thanks to the coatings, and it's rare that I have to make an adjustment to a shot due to flare. The only exception was when I was taking photos in a museum, pointing up at objects near bright lights. But other than that, they clean well and let me walk without a lens cap for those candid shots.

K&F makes some of the finest UV Filters for the price. The ring also includes groo

Great protection

first bought the K&F Nano series filter for one of my lenses. I believe it was for my Nikon 80-200mm F2.8 D ED lens. This lens produces really sharp images at a distance and is not a close focus lens, even noted by Nikon. I bought the lens used and it came with a dented UV filter. I got ghosting and when I removed the filter the ghosting was significantly reduced. I ended up buying several more for my other lenses. I also use B+W filters. Well-made filters too, but a little more expensive. The K&F is by no means a $100 filter, but for the price it does what I need it to do. I particularly like the grease and water-repellent nano-coating. Worked well when I was shooting at the beach. The sea fog is easy to remove without smudging. We really don't need UV filters anymore with digital because UV doesn't interfere with the sensor like it did with film. I just use them to avoid having to constantly clean the front elements of my lenses. I think keeping this to a minimum will prevent potentially scratching the element. I know there are a few schools of thought on this subject, but I just do what I'm comfortable with. From what I've read and can tell, the filter is glass and not plastic, which is nice these days. I have them on all my lenses now and am happy with them.

Great deal