[Dedicated] I was intrigued by the simplicity of the design, and ease of use, without having to change filters for different lenses. Plus, with the sensor exposed in mirrorless cameras, it acts as a dust shield while changing lenses (of course, I don't recommend changing lenses in dusty environments without further protection methods). This ND1000 and the ND64 are both great, and certainly help with light challenges. Using my Nikon Z6 II, the ISO levels are so great, lowering the available light and increasing shutter speeds are not creating any issues with image quality.


I am not putting down these Kase filters, as I like them very much. The title refers to a hope to see the glass quality continue to be refined as this style of filters get more popular, just like circular or slide in filters have over the years. But at the price point, they are amazing, and I don't always agree that spending 3x or 4x provides 3x or 4x quality increase in images.

[Glass] Glass seems to be high quality. Works as expected.

[Purple] The neutral night filter works as advertised

[Dedicated] I can't say enough how much I love this. But it does have one minor flaw, and that flaw isn't enough for me to deliver a star.
PROS: * it doesn't seem to effect the image quality or focus. * it's really easy to take on & off. This was my BIGGEST CONCERN, and I was relieved. * Safety! I feel so much more calm about changing lenses outdoors, knowing my sensor won't get scratched.
CONS:
* it attracts dust really bad, like it has static cling. But the security & peace of mind this gives me is totally worth blowing it off when I change a lens. TIP: Get a good blower bulb & censor brush brush when you buy this (if you don't already have one).

[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!

[Multi Coated] Nice and experienced crew.

[Purple] Shooting with the A7S3 @12800 ISO almost performs like a converted body for BW photography. I get nice results without slow shutter. Also love that I can use this filter with any lens. It really shines with the Sigma 14 1.8. Great entry point for IR if you have the a7S3. Check the customer images to see a few shot results.

[Purple] 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.

[Multi Coated] Glass seems to be high quality. Works as expected.

[Glass] I have never used an ND filter before. Novice review: Every youtube vid I've seen on ND filters talk abut color shift or color cast. I don't see it here!
I'm thrilled to use 1 ND filter for all of my different lenses.
Examples probably do not truly highlight the benefit of ND filters but it was my first forray.