Granted you have to put the magnetic ring in the hood first, then the filter, but it connects to the magnet and since this lens has a handy little sliding door, I can adjust the variable ND filter... lol..

bought this K&F Concept 67mm Magnetic Lens Filter Kit. These filters work great and fit my new camera. quality looks good. It was a good choice!... It allows me to take water shots on bright sunny days. It's not a variable and it's too dark for these dark, dreary days. You need a different filter for that. The filter is well made and easy to thread onto my lenses. It also comes with a nice case for storing and carrying. Images appear clear and sharp with no vignetting like you might get with some filters. Great value for money, definitely worth the money I tried to add more than one photo for examples but couldn't. I'll try to edit and add more later. I am happy with this purchase.

I bought this to use with a SmallRig filter holder which I bought unaware that it only works with magnetic filters. The filter part of the filter is fantastic and works exactly as it should. However, the magnet feels weak. I bought it to shoot videos at concerts, but I'll probably never use it for that because it feels like it'll fall off at the slightest bump. If you're using this in a controlled environment, I'd have no hesitation in recommending it.

The filter is nice and flat, the glass is impeccable. The screw thread fits perfectly into the thread of the lens and the lens cap grips easily. I could not determine any distortion of the colors in comparison shots. I use it to protect the front lens; I hope he lives up to his intended task.

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.

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.

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!

I have a long history of shooting with special effects filters. I've used Cokin systems where you can share a filter with different lenses using adapters. I own over 50 such filters and lately I've been simplifying my camera bag and traveling with just a few filters. My favorite filters are the Graduated Neutral Density (ND) filters. With these, I can rotate the filter to my liking for each shot. BUT it means I have to wear more than a pair of the same ND filter but on different stops.

Solution: The K&F Concept magnetic variable ND filter gives me the opportunity to use a filter that covers 5 stops within seconds. This is a great time saver as my landscape or sunset shots sometimes require quick image setup and adjustment to rapid light changes.

ND filters are an investment in your camera equipment. These filter out very bright light and enable the photographer to take longer exposures in daylight. My favorite use of ND filters is to make water movement look silky while still capturing the surroundings in detail. This K&F Concept filter is amazingly well built. The glass is better than my cokins. Because it's built for specific lens size diameters, I had to rationalize which lens I used most often and order that size. 58mm in this case.

The housing is a worthy vault for this filter. Kudos to the team that developed this feature. The magnetic ring screwed well into my existing lens. In fact it screwed in too tight, it took me 10 long minutes to unscrew it later.

The magic is in the magnet technology. Wow! It was instant on and instant off for the actual ND filter. Great. With that comes the fear of dropping the filter. I'm afraid a bump will loosen it, so I kept my hand on the lens the whole time. If you're in a stationary environment, you should be fine.

This lens filter is a great tool for many future vacation shots. Easy to carry and use.

Note that you cannot place a regular lens cap over the ND filter. Too bad.

Overall, I love the new direction these ND filters are taking. There is less effort and more time is spent on actually capturing images. Try it. I recommend this variable ND filter. 4.5 stars.