[Glass] The Kase Magnetic filter kit is well made, easy to use on location, and fast for filter changes.
I have used screw on filters for years and this is a real improvement. I highly recommend this product.

[Dedicated] I tried one other magnetic filter brand, but it paled in comparison to this set. I did a lot of research before ordering these, and even though I saw a few complaints, they just didn't make sense to me. I'm very happy with these, and the magnets are plenty strong enough, and yet pop on and off with ease. It was worth getting the largest set since it includes all I needed. The workmanship is excellent, and the glass doesn't have any colorcast whatsoever.

[4 x 3.9 x 2.5"] Perfect replacement for my Q. Lost mine in a shoot and BH delivered it super fast and cheapest price on the market. BH never disappoints.

[4 x 3.9 x 2.5"] Does what it is supposed to do.

[Multi Coated] I finally bit the bullet and purchased a set of filters for my largest diameter lens (112mm for the Nikon Z 14-24 f2.8). This kit works perfectly with the lens. It has an inset magnetic ring that screws into the hood of the Nikon Z 14-24. That hood also fits on the Nikon Z 70-200 f2.8. I bought the 77-112mm Kase magnetic step-up ring in order to use this set of filters with my other lenses.


I like the ease of adding and removing the filters afforded by the magnetic system. I've had zero problems with filters accidentally coming off.


I also like the image quality I get with this set of filters.

[0.355 lb] These are incredible because they can be used with any lens. Many people seem to be having issues with how they fit, and that's really because they aren't installing them correctly. The Kase text needs to be facing the sensor, if you put them in the wrong way, they are loose. If you put them in correctly, they fit nice and snug, on all Sony full frame cameras. I have the a7s III and a7 IV and they are not loose at all. I have a tech channel on youtube called Doubt Me Tech and I made a review/tutorial video on this set and you can see how to install them correctly. These are awesome and highly recommend them.

[0.355 lb] This hot shoe cover is an exact replacement for the Q2 stock cover.
I purchased one as a backup... and I suggest you do the same as they are almost guaranteed to go missing at some point!

[Solid ND] This is hands down the single greatest piece of photography equipment ever made. Timeless in design, durable material, sustainable sourced, just flawless to say the least. If I had the option to give it six stars, I would have because thats what this deserves. Leica has done it again!

[Glass] I have been trying to figure out a way to protect my Sony mirrorless camera sensor from dust and particles.  

My biggest concern with mirrorless cameras is how quickly the camera sensor can get dirty.  

These KASE filters have solved that problem. 

By using a UV or ND filter that fits directly, and safely, in front of the sensor.  These filters protect the camera sensor from outside exposure when switching lenses.  This comes with a carrying case that can hold two additional filters, 3 ND filters, 1 UV filter, cleaning cloth, a guitar pick to remove the filter, finger rubber gloves, & instructions.

Pros:
1. No need to add an ND filter for different sizes of lenses
2. Protects the camera sensor from dust and moisture
3. Comes with 3 different ND filters for your specific scenario
4. Includes a soft frame pad that sits nicely below the filter for prolonged use
5. Very easy to remove or install
6. No overheating issues or problems when using the entire day
7. Excellent video and image quality

Cons:
It doesn't have a snug fit in the Sony a7sIII.  If you remove your lens and your camera body is tilting forward, it can easily fall out.  The instructional video shows that these filters clip-in.  However, I believe the dimensions are slightly larger for the a7sIII.  So to be safe, you will want to remove your camera lenses with the body facing up.  

All in all, this is an excellent innovative product!

[Dedicated] excellent!!!!!