It has been used for a while, you can see it in the picture, it is very clean, this price is really worth it, no worse than 3,400! ! Enjoy the early start!

Maybe it's a bit expensive, there are even cheaper ones, I trusted the positive reviews, I used it for landscapes with cloudy skies and you notice the difference in the photos, it's a very useful filter that you always use for landscape design and do not replace it in post-production. Highly recommended filters

The processing of the lens is good, the material is there and the polarization effect is still very clear. When photographing mirrors and windows, the reflection is obviously filtered out. I haven't tried the scenery yet. I will check it later try it.

Had previously ordered the filter from AmazonBasic, but unfortunately it blurs my Sony 135GM F1.8 as if it were a much cheaper lens. The KF is sharp, and costs about 2.3 times more at ISO, quite normal and at F1.8 often very desirable in daylight. It's very flat, which in itself is a good thing. The only thing is that the lens cap does not hold as well as it should. Rotatability is ok, steady but a bit heavy. You should get yourself a pull-off tool, without it the filter is often difficult to remove. Filter effect at the lake was ok, but of course not all reflections go away, that would be against physics. So overall I'm very satisfied. Small addendum: The filter has a slight brown/yellow tinge, which is already noticeable in the sky. The corrugation when turning is good. If you have a good lens, you should not skimp on the filter. Possibly better a good one in 82mm and then adapter rings.

This is the first lens filter I’ve ever used. I’ve always read/heard that a good filter can make a significant difference, but I never ended up getting one until now. This polarizing filter is very nice! It’s easy to see the quality construction of glass and metal. In my pictures, you can see that the filter is attached to my camera, but I was also able to attach my lens hood directly to the front of the filter. It has front receiving threads in addition to the rear threads. A really nice feature is that the front of this filter freely rotates. This now allows me to easily rotate the tulip hood to the best position without any risk of the filter or hood loosening. I couldn’t do this when the hood was connected directly to the camera. Does the filter make any difference though? I’m pleased to say that it works very well! I often take pictures through a window, and it's very common for the picture to have a certain “haze” to them that wasn’t there if I took the same picture outside. I took a picture through the window with this filter in place, and I was pleasantly surprised to see a picture that looked like I had taken it outside. I don’t know exactly how this works, but it does. Just like polarized sunglasses, this filter “controls” the light in a way that improves what you see. I’m impressed!

mainly do landscape and street photography. I don't use many filters, but sometimes I use neutral density (ND) filters and neutral density filters for special situations. However, I often use a polarizer in bright sunlight. It can help tame unwanted reflections and is particularly useful for increasing saturation and contrast in the sky. This filter snaps easily onto my 77mm Nikon SLR lenses. The outer filter ring rotates evenly. (You'll need to align the filter for best results.) As with every polarizer I've used, this one reduces the light hitting the camera sensor. This reduces incident light by about one and a half stops. As far as I can tell, the mechanical and optical quality is good. This provider offers a variety of filters. The pricing seems very reasonable

These are well made filters, the ring is very small so they won't cause any vignetting even on fairly wide angle lenses. These threaded onto my lens smoothly and stayed on securely. These circular polarizers reduce the light only a little, and once they are screwed on there is an outer ring that lets you rotate the polarizer to get the best effect.

You can use these to reduce reflections from things like water, glasses and windows. Because it reduces reflections, you can see down into water making it look clearer and cleaner. It also helps deliver a clearer sky image when taking photos outside.

This is the "D" series filter, they also have a "K" series. I'm not sure the exact difference between the two as K&F's own website doesn't really explain it. As near as I can tell the "D" series ones (this one) are a slightly more expensive design with more layers of coating, including water/oil repellant coatings on both sides. They describe these as "waterproof".

Worked well with my ND filter.

The filter itself seems fine, but as for the packaging, the cardboard didn't tear where it should, I had to rip the cardboard apart, and as for the metal container holding the filter, it took me fifteen minutes and two knives, to open it

This isn't a bargain, but it's a fair price. CPL filters are used to eliminate reflections. The effect is clearer when photographing lakes, streams and such shallow bodies of water. Metal body and is a specialty filter that doesn't see much action but is another tool for the professional or amateur photographer.