First the good. This is a well machined and properly threaded magnetic ring with a multi-coat, optically clear polarized filter. The filter rotates easily to find optimal polarization. Results are as expected when taking pictures in the right conditions. Darker, richer blue skies especially in typical landscape shots. The magnetic ring allows for quick exchange with other filters or stacking of multiple filters.

My issue is that my standard lens cap for a Sony 24-105 F4 G OSS lens does not work on either the lens sitting inside the magnetic ring or on the magnetic ring itself. I get it. It is a kit that needs a K&F cap. This is the exact same issue I had reviewing a prior combo lens from K&F.

Search on Amazon for just the lens cap that fits the CPL? Extra but available. This was the case almost a year ago when I reviewed a similar combo. I rarely use a lens out in the field without having a cover available. Multiple covers? Another inconvenience. Sorry. Minus 2 stars for not correcting this issue.

It makes little sense to have a two-piece kit that only includes a magnetic ring and filter, especially if this is your first K&F set. Bottom line? Be sure to order the set with a lens cap if it is important to you. 5/5 for optical clarity and lens functionality. No lens cap? 3/5.