Canon introduced a new mounting system with the release of their Mirrorless cameras. However, this didn't make all those expensive lenses you already had obsolete - they just need an adapter.

A neat feature of these adapters is the ability to "slide" a filter in between the back of the lens and the sensor. Seems easier to carry, and most importantly you don't need to switch filters onto different lenses... as long as they are using the old mount.

Well when you get some of the new mount lenses in your collection, you run into a problem: those drop-in filters don't work with the new lenses. So now what?

This magnetic system provides the versatility of a drop in filter, but works on ALL your lenses. The magnetic attachment points are strong: there is no fear anything is going do fall off, regardless of your shooting angle. And it is incredibly easy to swap filters - easier than those drop ins. And, unlike the drop ins, you don't need to expose your sense to the open air- everything stays sealed up and protected.

Depending on the lenses you use, it is possible to use these same filters on different diameters. If you have some 82mm and some 77mm - just but a step-up ring and you are good to go.

Aside from.the functionality and ease of access, the filters themselves are phenomenal. From the clarity of the images you get through this glass, to the robust and smooth feeling of the rotation mechanism, these do not disappoint.

And you get all this for cheaper than a single Canon drop-in kit.

These are really nice, and they can bring efficiency to your workflow: no more screwing and unscrewing threads to get the perfect shot- just snap a different filter on!

Love these.