High quality glass with excellent ND filter performance. Turning the filter too far will not have an "X" due to the hard stop built into the design.

The kit includes a magnetic adapter ring that screws onto your lens and acts as a mounting tool for the ND filter - just toggle it on and off whenever you want. very pleasant.

It is important that the filter itself offers a wide range of densities with minimal color shift.

The slim design is great and does not cause vignetting with regular use.

Overall, a great filter will deliver consistent and reliable results.

The K&F D-Series UV Filter is a well-made, durable optical device that appears to perform as advertised. I wish I had noticed that the NANO series filters are a little better and only a little more expensive. If you compare this D series filter directly to the B&W UV Protection Filter (010) (XS-PRO), MRC Nano, the K&F product certainly seems to be of the same quality and performance for less than half to be of the price.

As a photographer, I use filters, but depending on the situation, it's not always easy to attach or remove. But with this system, it becomes so easy it's almost instantaneous.
The product is of very good build quality.
I wanted to test this new product. I was able to put them on and take them off without having to remove them very easily because the magnetic force is perfectly dosed.
Really very happy with this first release, I hope that soon other magnetic filters will be completed with this system to complete the offer.
This is a very good investment and the price is more than correct considering the quality and the results obtained.

I have to say that I'm really excited about this filter and I really enjoy using it, it has almost no color cast and no X pattern either. When filming, you can easily turn the filter from ND8 to ND128 and thus always perfectly comply with the 180° shutter rule.
The build quality is also very high and it doesn't feel like a $70-$80 filter at all.
I would buy again and again

I'm really excited about these new filters that K&F are releasing. The magnetic filter system is a great idea for strong ND filters as I often have to compose my shot without the ND filter attached (because without it it's much easier to see through the lens) and then have to attach it to take the shot . Being able to easily snap the filter onto the front of the lens takes a lot of effort out of removing and reattaching the filter.

The optical quality is excellent, with excellent clarity and hardly any color cast. The processing quality of the metal rings is solid; They are smoothly machined with smooth edges and beautiful knurling. The rotating ND filter rotates smoothly, with hard stops at both ends of the spectrum so you'll know when you've reached the limits.

The magnetic attachment keeps the filter firmly in place, but is probably best used in controlled tripod setups where you know the lens won't be bumped. I definitely wouldn't use this in mass situations where someone or something might knock the filter off, as it wouldn't take much of a jab to make that happen.

No lens cap is included, presumably because the extra weight would make the filter too heavy for the magnets to comfortably hold. K&F makes a magnetic lens cap that I got with another K&F filter set, but it doesn't fit on the outside of the ND filter because the outer ring is larger than 77mm. However, the magnetic lens cap fits on the inner ring, so you can use it when you don't use the ND filter. As far as I can tell, you can't buy the magnetic lens cap individually, only in a bundle with other filters.

The quality of this filter is quite comparable to that of Tiffen. It's reasonably priced and I would definitely recommend it for tripod landscape photography.

Have now used the filter in a wide variety of situations and can only say that it is great. Top picture quality and the protection is perfect. Use it on my 24-70 2.8 Art from Sigma on my A7 III. The image quality is not compromised and the lens is perfectly protected. The processing is very good and of very high quality. Completely happy.

Since I discovered photography as a new hobby, I was looking for different filters. With this ND filter, you can turn day into night and thus make long exposures during the day and at dusk. Through the manual settings of the filter, msn can adjust this to the appropriate surroundings and lighting conditions. Magnetic Variable ND Filter, the installation is very fast, you won't miss a moment I totally recommend this filter.

Exactly what I was looking for. I'm often on the road during the day and like to take long exposures. But since the camera settings are not enough, I looked for a Magnetic Variable Filter so that I can change filters in 10 seconds. I've had great results so far.

Great UV filter that adds nothing to your photos. No color shift, no bluish cast, no blurring... nothing. Just a crystal clear UV filter so you can rest assured your lens is protected. The slim design is nice because it doesn't produce vignetting. This quality is unbeatable!

So that you can form your own opinion, I have uploaded the pictures here without any editing. After post-processing, the pictures are really world class... There are no wrong colors at all. It can also be used in the wilderness when panning for gold. A tripod is highly recommended.