37mm Circular Polarizer Filter with Lens Cap Optical Glass Ultra Slim 18 Multi-Layer Coatings Polarizing Filter for Camera Lens Nano-Klear Series

Photos taken with the R5C with an ef 135L 2.0 at f/3.5. I've made no adjustments in post other than what CaptureOne does when it imports photos. To my eye, I see very little, if any color change. I've had other polarizers in the past that seem to do more than simply shift the rays of light. I noticed about 2/3 stop reduction in light transmission. The filter spins relatively smoothly with no real hangups like some others I've used in the past. I still need to get out and do some real-world shooting with this, but my initial impressions are good.

CPL or not, this is a pretty niche thing to use for any photo or video session.

I would consider it less useful than an ND, but that's just given the nature of my work, which occurs mostly in sunny outdoor settings.

This CPL filter comes with its plastic casing, a lens cap keeper and a lens cap.

I think the extra stuff is odd to include, but I'll take it anyways. I would rather get one quality product than one with free bonuses I wasn't expecting.

So back to the CPL filter. It may be useful. It reduces glares and supposedly boosts image contrast. So far, I've only tested it for glare and it seems to work.

Recommended.

Price when reviewed: £ 13.99 for 55mm filter.
Polarizing filters let you control reflective surfaces when taking photos. This type of filter has 2 layers, a fixed back element and a rotating front element. Polarizing filters can reduce the amount of light passing through it, so best to use in daylight.
I have tested this filter with a camera and a shallow bird bath in the garden. The two photos show the amount of control I was able to get in this simple test, with one photo showing the bottom of the bird bath as if the water didn’t exist and the second photo showing a reflection of the garden plants opposite.
The quality of the glass in this filter appears to be very good as there is no distortion in my photos. I like that you also get a lens cap as the original cap that came with the camera doesn’t fit with this filter attached. The lens cap retaining strap slips off a bit too easily so I’m using another one I have.
Overall, I am really pleased with the quality of this circular polarizing filter.

This is a well built polarizing filter, comes with sturdy plastic carrying case, lanyard, and lens cap. The construction of all parts are solid and easy to work with, I especially like the adjustment ring, the grooves are very pronounced and very easy to adjust without worrying about loosening the filter from the lens.

I didn't notice any degradation of image quality, and this works well in a variety of lighting scenarios, even partly cloudy and overcast situations. Overall very happy with this filter and can definitely recommend it for the rugged construction and picture quality.

The filter and cap came with a little wrist strap, which is always cute. The build quality on this feels rather nice, with a solid metal ring that fit smoothly into my Canon 49mm cap lenses. It came in a nice, if rather oversized and general-purpose plastic clamshell case for safe keeping, or for protecting a few video game cartridges or whatever.

I ordered this 62mm K&F Concept CPL filter for use on my Nikkor 20mm F2.8D lens. I own quite a few ND, CPL and UV filters from K&F. Except one with a rough turn ring, rest all have turned out to be good. This CPL filter came in a typical filter box with a lens cap and a lens cap keeper.

The lens cap is alright, it is not as good as the OEM cap and personally I don’t like it. The pinch is not deep and does not provide a good grip. I have never ever lost a lens cap since I started photography 14 years ago and so don’t see myself using the K&F lens cap. The lens cap keeper is a waste for me, I cannot tighten it over the lens barrel and so won’t be using it.

The filter was very clean out of the box. No markings on the filter rim besides the brand, filter name & size. The rim that turns is very slim and is very smooth. The lens cap fits over the filter just fine.

I took a few images with this CPL filter, it works well in reducing the reflections. So, a good CPL filter at a low price ($14.99) and if you need a lens cap, it comes with one.

This polarizer seems well made. I can't really speak to the optical quality as I am far from a professional photographer. I looked closely and didn't see any obvious optical distortions or artifacts and it looked clean through the viewfinder of my Nikon ZF with the Nikon 28-75 zoom lens attached.

The filter is quite thin, which can make it a little difficult to grip the polarizer ring in order to rotate it. However, that thinness means there should be no vignetting when shooting at wider angles. Indeed I saw no vignetting at 28mm with this filter attached. But when I stacked a UV filter with this filter there was mild vignetting. I don't have any 67mm filter threaded lenses wider than 28mm that I can test with to see at which focal length vignetting appears but based on the fact that stacking with my UV filter introduced vignetting I don't know that you could go much wider than 28mm.

I think it would be better if more of the polarizer ring was knurled to improve the grip for twisting. There are two knurled regions each of which spans about 60 degrees of the perimeter (see 2nd photo). I would prefer to see the entire perimeter knurled except for the small area where the filter specs appear.

Twisting the polarizer has more resistance than I expected, but I suppose that is good because it will keep it from losing its position once you set it. Also, it is important to remember to always turn the polarizer in the counter-clockwise direction or you might accidentally unscrew the filter from the lens while twisting it to adjust the polarizing angle.

The highlight for me was the included lens cap with the nifty lens cap keeper. I hate those cap keepers that use double side tape to attach to the lens cap. The one included with this filter is just perfect.

I wish the box the filter came in was smaller so it didn't take up so much room in my bag. You can see from photo 1 that there is quite a bit of empty space.

I got this for my iPhone filter mount that take 67mm filter, the extra cap is perfect as phone don’t have extra lens cap to protect the glass.

The K&F Concept 67MM Polarizing Filter is a solid addition to my photography kit. The filter fits well on my lens, and the included cap and lanyard are thoughtful touches that add convenience. The lens itself enhances image definition noticeably, delivering clear and vibrant photos. The ultra-slim design and multi-coated Japan optics make it a reliable choice for those looking to improve their image quality.

This does have a separate ring to spin, so you don't have to spin the thread to adjust it. It has a nice friction so you're not fighting it, and it's still solid enough to keep it in place.

I really like that it came with a cap, so I can leave it on and not have to worry about it.

The pictures come out clean with little to no color adjustment. I've been a fan of K&F products, and this is another great example of why that is.

Overall a great polarizer.

Highly recommended.