67MM Circular Polarizer Glass Filter Ultra-Slim, Multi Coated

Product came as shown, works great. I mostly bought it to protect my expensive 85mm lens.

Has been perfect for addition to my kit

I wasn’t familiar with the K&F Concept brand and the very low price sparked my interest. This being a circular polarizer, $16 for the 62 mm version is far below any of my other (name brand) polarizers. Should this be a viable alternative, especially since the glass supposedly is from Japan?Out of the box, the filter feels like good quality. The low height does help keeping Vignetten to a minimum, especially when stacking with another filter. Some photographers prefer to add a cheap UV filter, albeit mostly for protection from scratches since the UV filter is a lot cheaper than a typical UV filter. However, in this case the math may not add up since the CPl filter is as cheap or cheaper than name-brand UV filters. (The less reflective elements in front of the lens , the better.)Speaking of reflection. The listing claims high transmittance and low reflectance. Transmittance is difficult to judge without proper tools since the main purpose of a Polarizer is to filter (reduce) light, albeit typically the type that becomes polarized use to reflection from dielectric surfaces (water, glass, leaves). In the limited testing, that does not appear much different from other filters I have, but that may actually be a compliment since those are pricey at over 10x the cost of the K&F.Reflection, on the other hand, is a bit easier to judge. I included a side-by-side comparison of the reflection of a daylight balanced light bulb and the larger filter is a brand name that costs a little fortune relative to filters. The smaller blueish one on the right is the K&F and it is quite noticeable that it’s much more reflective than the expensive one. Now, as the prices span an order of magnitude, it’s not totally fair but it does put the effectiveness of the multi-coating in perspective. Reflection actually matters most when including a bright light source in the picture and you end up with ghost lights from the reflections bouncing between glass elements.The color enhancing part of a polarizer needs to be used with caution, as the captured image is void of the filtered light and excessive filtering of water reflections may simply look unreal just like an extremely blue sky rarely improves the picture. In that regard, however, this filter performs just fine and of course is most effective 90 degree to the sun. Metal surfaces typically don’t polarize the reflected light and the filter is far less effective than a glass pane where the right angle allows to make a fully reflective window nearly perfectly clear by filtering out all reflections.Overall though it is hard to ignore the low cost of this filter. it may not completely match professional (pricey) filters, but it’s not a bad choice at all. Low profile and a nicely sculpted outer diameter sure make it look and feel more expensive than it is.

This is a fantastic and affordable CPL - my second one, to fit another lens. I know there are many other CPLs available, some cheaper, but I would totally put out a few more dollars to buy this filter. There is no color cast, and the rotating mechanism works flawlessly.