I've heard varying opinions on the benefits of keeping a UV filter on the end of a camera lens. Many people say it's smart because if you drop the camera, replacing a filter is much cheaper than repairing an expensive lens. I've heard others (particularly professionals) say it doesn't make sense to buy an expensive lens and then put a cheap piece of glass in front of it that will just degrade the image. Those folks say keeping the hood on the lens will provide plenty of protection and if you have an expensive lens, it should be insured against damage anyway.

I've invested in some good Canon L-series lenses so I'm torn on the best approach. I've been leaning towards going without the UV filter, but I still want one if I'm somewhere like the beach and sand or dirt is blowing. So if I'm going to put another piece of glass on the lens, I want to make sure it's high quality and this filter meets that requirement. You can tell when a vendor has put a lot of thought and care into a product and it shows throughout the process. This filter comes in very nice packaging and they provide a high quality case that has a magnetic latch and a nifty ribbon on the side that you pull to extract the filter from the case. This keeps you from having to reach in and possibly get fingerprints on the filter. Great design!

As to the quality of the filter itself, I don't see any aberrations in the image when I use it. This line of filters from K&F aren't cheap so they won't be for everyone, but if you are taking your photography seriously, you should consider this product.

I've heard varying opinions on the benefits of keeping a UV filter on the end of a camera lens. Many people say it's smart because if you drop the camera, replacing a filter is much cheaper than repairing an expensive lens. I've heard others (particularly professionals) say it doesn't make sense to buy an expensive lens and then put a cheap piece of glass in front of it that will just degrade the image. Those folks say keeping the hood on the lens will provide plenty of protection and if you have an expensive lens, it should be insured against damage anyway.

I've invested in some good Canon L-series lenses so I'm torn on the best approach. I've been leaning towards going without the UV filter, but I still want one if I'm somewhere like the beach and sand or dirt is blowing. So if I'm going to put another piece of glass on the lens, I want to make sure it's high quality and this filter meets that requirement. You can tell when a vendor has put a lot of thought and care into a product and it shows throughout the process. This filter comes in very nice packaging and they provide a high quality case that has a magnetic latch and a nifty ribbon on the side that you pull to extract the filter from the case. This keeps you from having to reach in and possibly get fingerprints on the filter. Great design!

As to the quality of the filter itself, I don't see any aberrations in the image when I use it. This line of filters from K&F aren't cheap so they won't be for everyone, but if you are taking your photography seriously, you should consider this product.

K&F’s build quality has been second to none in the last several years. They’ve created a series of extremely high-quality filters using very slim precision machined brass rings ( brass is a much better material to use for this purpose than aluminum. It’s much less likely to strip threads or to cross thread) and excellent optical glass.

This filter is no exception. It has absolutely no optical distortion whatsoever. It filters UV and pretty much nothing else I think it has about a 99.9% visible light transmission.

Most people use UV filters to protect their lenses but it’s also helpful to filter out UV light for photographic reasons. It can help to increase the life of your camera sensor and prevent distortion in the images.

The anti-reflection coding on this is extraordinary. This competes well with my expensive high end German filters that cost up to four times as much money.

This filter is slim enough that it should not interfere with the image or create any vignetting even with wide-angle lenses.

This is my review for the UV filter but honestly every K&F filter I have purchased has been extraordinary.

Look at the photo and see if you can tell any difference.

K&F’s build quality has been second to none in the last several years. They’ve created a series of extremely high-quality filters using very slim precision machined brass rings ( brass is a much better material to use for this purpose than aluminum. It’s much less likely to strip threads or to cross thread) and excellent optical glass.

This filter is no exception. It has absolutely no optical distortion whatsoever. It filters UV and pretty much nothing else I think it has about a 99.9% visible light transmission.

Most people use UV filters to protect their lenses but it’s also helpful to filter out UV light for photographic reasons. It can help to increase the life of your camera sensor and prevent distortion in the images.

The anti-reflection coding on this is extraordinary. This competes well with my expensive high end German filters that cost up to four times as much money.

This filter is slim enough that it should not interfere with the image or create any vignetting even with wide-angle lenses.

This is my review for the UV filter but honestly every K&F filter I have purchased has been extraordinary.

Look at the photo and see if you can tell any difference.

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.