A very nice filter. So far I cannot complain. It does not seem to produce sun flares or any other noticable distortion like cheaper filters will.

This filter works great to filter the intense sun that creeps through windows in photos of buildings.I'd highly recommend this filter!

I would not recommend it to a friend, I bought it to use it for taking shots of the ocean against the rocks, well when I place it to Max it does not close the whole disc black but does a star shape so that in the picture the corners are blown out and it gives a lot of cross-polarization. I was told it is common when you buy variable density filters that are not fixed. I just bought and received the Image ND 2 4 6 replacement filter kit and worked much better for me for what I was trying to accomplish. updated - Oct 27th - I am told that to use this filter it is best used at a 90 degree angle of the sun, that is you place your sholder facing the sun then stick your arm out in front of you at that in 90 degrees to help with flare and cross-polarization.

The Greystone CPL Filter by Haida is definitely well-made. The threading is smooth. There is knurling at the outer edge of the rotating ring and above the threading. I threaded this filter onto my UV filter, then removed the UV and threaded it directly onto my lens. Both times I struggled to remove the filter because it's ultra slim and the knurling is tricky to grasp.The filter performed perfectly in an LED screen test. My test photos were of the sun glaring off a pool surface. With the filter, I was able to step down a full stop, reduce the glare and capture much more detail of leaves on the bottom of the pool (winter time!). The lighter photo with the sun glare is without the CPL filter and was shot at f/8.This is a great value for a high quality filter.

I use a uv filter to protect the lens, but sometimes you get glaring if pointed near the sun as expected as they all do unless its coated. Good lens.

I bought this filter to use in bright sun light with flash without always having to use hss.

I used this filter to test the Gopro10 video with a lot of sun... It works as expected and I can get a good level of exposure and at the same time little bit more motion blur... Good product at a.good price. Raccomended for sure... Next time I will buy the "day kit" with more different filters. The material is robust and easy to mount. You can rotate the filter to add the polarization. Happy.

Polarized filter does the job reducing reflections in water or sun glare from mirrors, or glass!