A UV filter may help the look of some outdoor photos in bright sun, but honestly I can't see much difference. I use UV filters like most people do, as a way to protect the front element of my lenses. If you're shooting someplace where the lens could get stuff on it, like in the rain, at the beach (salt spray), or the pool (splashes), at a party where people might be getting sloppy with drinks or around kids/pets who might reach out and touch the lens, a UV filter is good protection. It's much easier to clean a filter than the element on an expensive lens!

Of course for this purpose you want a filter that won't degrade the quality of your images, so far as I can tell this one does not. I haven't noticed any visible darkening or color shifts, in fact when I first opened the box for a second I thought there wasn't any glass in the filter ring! So overall I think this will offer some protection to your lenses without changing picture quality. And of course, if you're someplace that isn't hazardous to your lens you can easily take the filter off.

While it's not a downside, I do kind of wish K&F would standardize their filter cases. I have received 3 different kinds already, and it would be nice if they had a stamp/sticker on the outside so you can quickly tell which type of filter is in the box! Luckily, I have a label maker.

... and I can't say anything negative. I have several of them for different lenses and never had any problems

Very thin and light, it does not alter the color rendering

I added this to my Canon Rebel T3i camera. The camera is a few years old and I love it. Cleaning the lens is always a chore, you have to get out the right cloth and make sure not to scratch it! But with this on, I can just use my shirt. If I scratch it, it was $20 and I can get a replacement. I'm really happy with that!

This makes the pictures somewhat more vibrant and clear. My daughter, who is the photographer, loves it.

Definitely low profile, uv protective of camera. I think there is slightly more contrast in photos too which is welcome! Highly recommended!

Quality filter from K&F concepts at an affordable price. The filter is slim and threaded onto my lens easily. I experience no vignetting with this filter on my 18-45mm kit lens. The lens is clear, and provides a layer of protection for my lens. Photos included show the photo taken without the filter attached (the one with the filter in the photo), and then the same shot after I installed the filter. No difference - exactly what I'm looking for. You can't go wrong with K&F concepts - high end quality at a budget friendly price.

Made from high-quality materials. Precisely built. It offered the least amount of resistance I've had screwing on a new filter. It's very thin so it won't interfere with wide-angle lenses (as much as is possible).

Using a full-frame DSLR, I did side-by-side, pixel-level comparisons between shots with no filter and with this. One photo was a wide-angle shot the included sky on a high-UV day.

Results: well, I didn't see any difference in color or richness in the high-UV shot, so I wouldn't buy it just for that. Mostly, people buy these simply as lens protectors (and trust me, they've saved my bacon on a high-end lenses several times now!). As a lens protector, you want it to be as unobtrusive as possible and I am pleased to report that I can detect no significant difference with any test shot - color balance, sharpness, contrast - they all are so close that I could never say definitively that any minuscule difference was due to the filter.

A very high-quality product with (presumably) a good level of protection. The packaging and case also convey a feeling of quality and pride in their product.

Excellent quality/price ratio. The filter is the top of the range.

it fits right in and felt protective. Also I am able to rest in peace for the lence