The lens is extremely well-made and the effects that this filter is capable of providing are superb. Excellent construction with precision threads, as well as magnetic instant on/off capability. The NANO multicoating is superb and produces NO artifacts, focus issues, or other issues.

Diffusion filters are used for a number of purposes, not the least of which is for softening skin contrast and creating a "dreamy" effect for portraits and general subjects where a softened contrast is desired.

This 67mm set is a widely used size by many lenses. For me, it is the right size for the majority of my Tamron Lenses, as well as the Sony 85mm f/1.8, SIgma 16mm f/1.4 APS-C, and my Canon 100mm f/2.8L Macro lens. That makes this single filter set a superb value at the already great price on Amazon.

This particular filter model provides 1/4 diffusion that creates a softer, cinematic effect and is outstanding for use in both still photography and video as well. This K&F version uses a unique magnetic adapter that is screwed into the front of the lens and allows for a 1-second attachment of the Diffusion filter for easy use and removal. On/Off instantly.
That makes it incredibly easy to use a camera with or without filters and not have to screw them in or out repeatedly. Awesome innovation!

As a YouTube video-producing influencer and Vlogger, this filter has been fantastic for spur-of-the-moment shots and videos when I see a scene or shot that would greatly benefit from some softening...especially of people for live action or portraits when shooting outdoors in bright light or sun. Shadows are not affected and reflections are somewhat softened. Perfect!

I own a number of K&F filters of different types including UV, ND, Polarizers, and Diffusers. I have come to strongly trust the company's products without hesitation. This particular filter set is a superb value at the price as compared to much more expensive similar filters like those from B+W and Hoya, while providing virtually equivalent performance. Awesome!

For me, this filter is unequivocally a Strong FIVE STAR winner, and gets my honest and VERY hearty recommendation! SImply superb!