I just received this 37mm CPL filter and it looks excellent. It even has a ring to turn the CPL filter to get it in the perfect position. I got two of them for $8.10 with S&H.
Each filter is 2.84$ with free S&H. I elected to pay a couple more dollars for faster shipping but to each their own.
I tried using a 24mm CPL filter with my Yi 4k+ but it created vignetting so this 37mm filter looks perfect. I got an adapter for Yi from Ebay for a few bucks. AliExpress has it for about two dollars now.
https://www.aliexpress.com/item/Hig...L-C-PL-Filter-Lens-For-Canon/32729726180.html
https://www.aliexpress.com/store/pr...for-Xiaomi-Yi-Camera/3197059_32836256861.html
Each filter is 2.84$ with free S&H. I elected to pay a couple more dollars for faster shipping but to each their own.
I tried using a 24mm CPL filter with my Yi 4k+ but it created vignetting so this 37mm filter looks perfect. I got an adapter for Yi from Ebay for a few bucks. AliExpress has it for about two dollars now.
https://www.aliexpress.com/item/Hig...L-C-PL-Filter-Lens-For-Canon/32729726180.html
https://www.aliexpress.com/store/pr...for-Xiaomi-Yi-Camera/3197059_32836256861.html