This is the flagship series from K&F, so if you want the absolute best filter they produce, this is it.

It has a brass ring, which is slightly harder than aluminum. That makes it more resilient to binding on the threads, and makes the filter itself feel much nicer in the hand.

It has inner and outer threading, so I can stack filters, or clip my lens cap directly to it. That's great for me as I don't have to ever take this filter off. The main point of this filter for me is protection, and it's so much nicer having a high end piece of glass to put on my high end lens rather than most UV filters that are a piece of plastic.

I tried to make it produce flares, and I couldn't get any. This is the closest thing to a perfect UV filter that I've ever used.

I also really like the design of the case. It has a pull string on the side that'll push the filter out so I don't have to worry about getting fingerprints on it.

Overall a very high end filter.

Highly recommended.

Simple and clean is the way. I've learned that some cheaper alternatives add distortion or even discoloration to your photos and I don't want something that keeps me in the touch ups longer than I need to be. K&F has really done something simple and beautiful here. No distortion. No discoloration. And I can let this live on my lens to keep it safe and offer an extra line of defense in the unfortunate event that something happens. Quality of the build is nothing short of what you'd expect from K&F. Everything fits into place, screws on nicely, and the glass feels like it's secured into the metal housing. Definitely recommend even with the other massive amounts of competition out there.
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Simple and clean is the way. I've learned that some cheaper alternatives add distortion or even discoloration to your photos and I don't want something that keeps me in the touch ups longer than I need to be. K&F has really done something simple and beautiful here. No distortion. No discoloration. And I can let this live on my lens to keep it safe and offer an extra line of defense in the unfortunate event that something happens. Quality of the build is nothing short of what you'd expect from K&F. Everything fits into place, screws on nicely, and the glass feels like it's secured into the metal housing. Definitely recommend even with the other massive amounts of competition out there.
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This filter came elaborately packaged suitable for gift giving. It also looks great with a gold colored inlay showing its pedigree. Please see the image that’s part of this review for a look at part of the gold colored lettering.

It sure does look the part. I tried some test shots with the filter on and off the lens and then did the best pixel peeking I could noting no difference in exposure or color cast. To be fair, I’ve never noticed this with any high quality filter. I’ve never bothered with bargain basement filters because I have no interest in Lomography or its related ilk.

The manufacturer says this is thin and it is. Please see the image where I compare this filter with another UV that costs less than half as much. Both seem thin to me. I don’t see how thickness makes that much of a difference because adding any filter will require the removal of this one or you’ll get image quality robbing refractions from between the two filters.

I considered using a micrometer to measure the thickness of the lens itself but gave up the idea because I had no way to assure that I’d not scratch either this or another filter I’d use for comparison.

In sum, this does work well as a UV filter and it does not in any way alter the images when compared to the same lens without this filter attached.

This filter came elaborately packaged suitable for gift giving. It also looks great with a gold colored inlay showing its pedigree. Please see the image that’s part of this review for a look at part of the gold colored lettering.

It sure does look the part. I tried some test shots with the filter on and off the lens and then did the best pixel peeking I could noting no difference in exposure or color cast. To be fair, I’ve never noticed this with any high quality filter. I’ve never bothered with bargain basement filters because I have no interest in Lomography or its related ilk.

The manufacturer says this is thin and it is. Please see the image where I compare this filter with another UV that costs less than half as much. Both seem thin to me. I don’t see how thickness makes that much of a difference because adding any filter will require the removal of this one or you’ll get image quality robbing refractions from between the two filters.

I considered using a micrometer to measure the thickness of the lens itself but gave up the idea because I had no way to assure that I’d not scratch either this or another filter I’d use for comparison.

In sum, this does work well as a UV filter and it does not in any way alter the images when compared to the same lens without this filter attached.