Oh my gosh, the putter is such a lifesaver. I've never been a fan of twisting the tiny, super-slim surface of any type of filter. ND filter, CPL filter, diffusion filters, they all lack putters! I'm certainly glad that K&F Concept decided to introduce this into their filters, including this one.Onto the ND functionality itself, this prevents me from having to increase my shutter speed or aperture. It allows me to maintain a shallow depth of field on my subject even in broad daylight. And yes, it also works for landscape photography and other uses, but my main usage has been for taking video of people.If you're familiar with the exposure triangle, you may recognize my situation. Reducing my aperture would remove my shallow depth of field, and increasing my shutter speed would make my subjects motion look weird, it would just look very off. There would be no motion blur, and as a result the image looks unnatural in our eyes. So, this ND filter was perfect for fulfilling that need.Overall, I really do recommend this filter if you're looking at increasing the quality of your videos, and obviously this depends on what you're looking to use it for. If you know that you need an ND filter, don't go with the cheap glass. Go for something like this instead! It'll totally be worth it.

This filter is perfect for when you want shoot with a wide open aperture in bright daylight. Well built and easy to use.

Good working spot light solar works even in full shade

I really liked this filter. I got this filter with the intention of the Solar eclipse that just occured. I am very happy that I got it and will be using again.

I love the adjustment handle on this filter. I use this on a very wide aperture lens sitting inside of a teleprompter. My previous filter didn’t turn very easily anymore and I needed to use two fingers, which meant taking some of the teleprompter apart to get in there. I also couldn’t do it while in front of the teleprompter to see if I have the right exposure. Enter this filter. I can just stick my finger in and adjust with the little handle, all while in front of the camera checking exposure. It might seem like a little thing, but it saves me a lot of time. What was a 15 minute back and forth is now a couple seconds.The optics are fantastic. No aberrations or other other optical issues. Very high quality build as well. I recommend this filter.

Solar it sounds grate even at full blast just how I like to listen

This filter is amazing both Nd & polarizer. I use this filter for video to have my shutter double the frame rate and aperture low. The polarizer gets rid of the glare & reflection really well. Overall it’s a great filter I highly recommend it for run and gun filmmakers.

This telescope has great viewing capabilities, but i wish i could find the solar filter that goes with it.