I now use more my camera without worrying about the reflection or bright spots I love that is easy to install and I can change to less filter to higher. The package is a great addition to protect the ND I definitely would love that.

Still I have to try more the filter with the Pandemic situation is not possible to test this on other scenarios or more often still holding my final review.

I purchased this because I didn't want to spend hundreds on other options out there and this one works very well. A little green cast but overall not too bad. It has saved me when I film outside and want to get the best looking background compression in the sun. Comes with a nice case and its built very well. Love the indicators that tell you how many stops you are adding. Would purchase again.

After reading tons of reviews and comparisons to more expensive ND filters, I settled on this one. I was not disappointed! It performs exactly as advertised. There's no dreaded "X" at higher settings. It is a high quality item and a welcome addition to my Fuji kit. I bought it to fit the largest thread size I use (Canon EF 70-200) and use step rings to use on smaller lenses. It works great!

I purchased this a while back but decided to do a more controlled test today. My copy does have an almost imperceptible green tint. Certainly correctable with white balance adjustment either in-camera or in post. More importantly, I tested this on a extremely sharp 20mm lens with a high megapixel camera and was unable to detect any distortion or image softness due to the filter. Less one star because the threads are not easy to align on the lens. For me, it is good value for the money.

Product: 58mm Variable ND2-ND32

Description: The rim of the filter is made out of what I'd assume is aluminum, coated matte black, (which has a nice weight to it, and has hard stops at ND2 & ND32). The rim itself is actually fairly nice. It's easy to put on, and easy to take off due to the wide ridged design around the base of the filter. The high index optical glass is indeed nano coated to protect against water/oils from fingerprints, rain, & etc. Which are easily removed without struggle in my testing with a clean micro fiber cloth (not included). The glass itself has a slight yellow tint to it (which you can see from the photo comparison), which can also easily be corrected through your cameras auto white balance, or lightroom. The filter also doesn't loose to much detail if adjusted properly which is nice as you will see from the photos, and their description in the next section.

Photos: The first four photos of the product were taken without any filters. Though the next two of the black & red mouse pad were to show detail comparisons. These two photos were taken about 1-2ft away, but are cropped to show detail. Which were slighty adjusted to be as equal as possible.
Without the filter: F4.0 1/15s. ISO 400
ND32: F4.0 1s ISO 400

The next 6 photos of the flowers next to the bird bath were taken without adjusting any settings to show the darkness of the filter (F5.6 1/320s ISO 100), in this order: No Filter, ND2 1st, 2nd, 3rd, 4th, & ND32 5th stop.

Overall: The produce works well, and is well made! I would highly recommend picking one of these up, along with a circular polarizer. Though only notable things I found with the product is that it has a slight yellow tint of the filter, the front thread size of the filter in bigger then 58mm, and the top of the filter very slightly wiggles. Otherwise it gets a solid A from me!

Extra: I used a 49mm-58mm step up ring for the filter to fit my Canon 50mm F/1.8

Camera/Settings: Shot on a Canon Rebel SL3, with custom white balance settings set to +/-0,+/-0 for raw color quality.

Filter is not wide enough to accommodate even a standard zoom. I have it mounted on a Sony 18-105 f/4 G lens paired with my Sony a6300. In photo mode, all four corners have a very HEAVY vignette. The vignette is visible from 18mm all the way until about 50mm. 18mm isn't even considered wide - angle on an APS-C Camera. The build quality and image quality itself are very good, however, the vignetting renders the filter unusable. Avoid this product if you plan on using it with a lens wider than 50mm.Update: K&F Concepts offered to send a fixed ND 1000 filter plus Step down filters so I am able to use an ND to take photos. I appreciate the help that they offered me so I updated the rating of this product. This 72mm Variable ND filter is very sharp and has no color fringing. If the vignetting issued gets resolved then it would be a near perfect product - especially for the price. Good customer service but subpar product.

I have a Sony A7III with a couple of the Tamron lenses they recently release, 67mm thread on both. I used the ND for the first time on a shoot in broad daylight mid-day and loved the results. Best part is being able to dial in very easily the amount of stops I need to make the zebras go away. Smooth operation and sturdy construction. The only negative is that the lens hoods no longer fit once the ND is on. Not a deal-breaker but be aware.

EDIT: Also took it along for a trip to Lake Tahoe and it came in very handy for those longer exposures and to get more contrast out of the sky. Awesome and so easy to use!

I got these for my trip so that I could do long exposure shots. Sometimes Minimum aperture is not good enough. I used these NDs on mainly max setting and in conjunction with some step down adapters. I figured it's best to get the largest size and then step down so that I can use it with all lenses. I was able to retain 98% of the image quality while use its max setting. One more feature I liked about this was that it did not spin all the way. It only spins half way from Min ND to MAX ND and does not reach any X spot at all. The f stops are also marked on the filter so you know how many stops you are dimming the light by. I did not see any color changes to the images that I got. Over all it was a decent purchase for the money spent. The case is also quiet nice to carry the object around

Over the weekend, I tested the K&F 82mm Variable ND Filter (ND2-32). I found that the image quality was great and I didn't notice any abnormal or uneven colour casts (see attached sample image). ND32 was enough to smooth out a waterfall on an overcast day. I think if it was sunny I would probably need a ND64 or greater. The variable ND filter ring moved smoothly and it was easy to adjust between shots.
My one issue is quality control. I noticed a flaw in my ND filter in 2 places near the frame of the ring. I'm not sure what causes it and it doesn't affect my image quality.

Typically you get what you pay for when it comes to camera gear but this product is one of those rare exceptions. I was very hesitant to purchase it based on the price but after watching dozens of reviews on variable ND filters I figured I would give it a shot. I have never been a fan of variable ND due to some of the image artifacts they are known for. I always used individual ND filters as needed which can be a pain when shooting run&gun video.

I loved that this ND filter had hard stops to not go past the usable points of filtering and that they somehow eliminated the dreaded x shape in the picture. While photos may be able to recover from some of these artifacts it is much harder to get around them in video.

So far I am completely blown away at how good this VND filter has performed. The picture quality as far as my initial testing has shown is stellar. Color cast seems to be at a minimum and there is absolutely no X shape or vignetting. To be fair I bought the 82mm size version and use step up rings on my GH4 and m43 lenses but so far even on the 62mm wide 14-140 lens visually the VND seems perfect.

My only super tiny issue which is true of all VND filters is that turning a filter on the front of the lens while shooting video is very easy to accidentally get my fingers in the shot. Would be nice to have the option to screw in a tiny handle into the VND so I have something to grab onto and not get my fingers in the shot. Maybe something the manufacturer can consider for a future product.