K&F CONCEPT NANO-X CPL Filter 28 Layer Super Slim Circular Polarizing Filter Multi-coated Polarized MRC Filter（37-127mm）

The product is good, quality seems high. I use this CPL filter with a 50mm f1.8 lens, allows me to take photos without reflection and richer color.\nThe problem I have with this filter on my lens is handling.\nThe Canon RF 50mm f1.8 has external zoom, meaning the lens extends and retracts while focusing. I hence need to be careful not to damage the lens mechanism.\nAlso, the body of the lens is much bigger in diameter than the filter thread, which makes this very fiddly.\n\nI use another CPL (though the Nano-X Pro) on my 77mm lens, which is a lot easier to handle.\n\nFor small diameter filter on a marker lens, I’d suggest to consider using a step-up ring and use a larger filter. It will likely be easier to use.

good