I recently picked up this variable ND filter for my camera setup and honestly, I’ve been really impressed with the performance for the price point. I ended up purchasing the 72mm version after trying the 77mm model, and both have delivered solid results for photography and video work.

The build quality feels premium right out of the box. It comes with a nice protective case, and the filter itself is made from metal and glass, giving it a durable, professional feel. The adjustment ring rotates very smoothly, making it easy to fine-tune exposure while shooting outdoors.

The variable ND function works exactly as expected. Image quality stays sharp across most of the range, and I didn’t notice any major loss in detail during my testing. At the strongest ND settings there’s a slight colour shift and some vignetting, but nothing that can’t be corrected quickly in Lightroom or other editing software.

For creators who shoot both photo and video, this is an incredibly convenient all-in-one filter for travel and everyday use. I still use my square filter system for more demanding professional shoots, but for quick setups and portability, this filter has become my go-to option.

Considering the quality and versatility, the price feels fair overall. If it were slightly cheaper it would be an even better value, but I’d still confidently recommend it to anyone looking for a reliable variable ND filter without spending a fortune.

I’ve been using the K&F Concept 77mm Variable ND Filter for a few weeks now and it has quickly become one of the essential accessories in my camera bag. The build quality feels premium, especially considering the affordable price.

The filter works exactly as advertised. It helps control light beautifully when shooting outdoors and makes it much easier to maintain cinematic shutter speeds for video. I was also impressed with how well it reduces glare and reflections while keeping image quality sharp and clean.

The adjustment ring turns smoothly, and I haven’t experienced any noticeable X-pattern issues within the usable range. The hydrophobic coating is a nice bonus too, especially for outdoor shooting in unpredictable weather.

Honestly, I don’t leave home without this filter anymore. It’s one of those accessories you don’t realize you need until you start using it regularly. For the price, the performance is outstanding and I’d absolutely recommend it to photographers and videographers looking for a reliable variable ND filter.

This is amazing, really cheap and really good, high-quality glass, I accidentally dropped it and it didn't even have a scratch! works very well, and the ring isn't too loose. However, if you tighten it a bit to much,it will be hard to remove.
Recommend using a rubber band to remove it in that case,
although it is very very good, recommend it 10/10, you won't be disappointed!

As a Professional Photographer and now moving over to Video as a Hybrid Shooter and content creator I have a growing number of new Professional mirrorless cameras & lenses. With many lenses of different diameters it is first and foremost important to protect the lens elements from damage. Then decide on what specialty filters that will help you with your composition & image making. From UV, circular polarizers, and Neutral density filters, K&F Concept Professional Optics makes great glass. In my many years of use of different brand name filters, it is my opinion K&F Concept will give you the BEST bang of your BUCK. Buy one today, try it out and see for yourself!

ordered the Teslong endoscope camera for examining hard-to-reach places. Since I will probably only use it a few times a year, it is perfectly adequate. You can't just compare them to a professional device. It comes in a handy storage case with foam inserts. Operation is clear, self-explanatory and the display is easy to read. The first thing I checked was the drain in the bathroom sink, because hair often gets tangled up in it and clogs it. I have to disassemble and clean the siphon regularly. Now I can inspect the drain with this camera and use the hook to remove any hairballs before they become a problem. After a bit of experimenting with the LED lighting, I got quite good and sharp images, on which you can also see details. The brightness can be adjusted in 6 levels and is completely sufficient. The recordings are stored on a supplied 32GB SD card and can therefore also be viewed later on the PC. The flexibility of the probe hose is pleasant and not too rigid. However, it is difficult to steer, so that it sometimes takes a few tries before you hit the desired position. It can take a while, especially over long distances. The additional lenses are very helpful because you don't have to work with a deflection mirror, as is the case with some competing products. I have no complaints about the processing. There are no sharp edges or burrs.

Really balanced out the picture for our church livestream, we have all LED lights inside.

Der Filter tut einfach, was er soll. Die Verarbeitung ist tadellos. Ich hatte bis jetzt ND Filter von Hama, Hoya und Walimex. Farbneutral war keiner. Dies ist mein erster variabler. Er macht das Bild etwas wärmer und gefällt mir am besten. Der Farbton bleibt auch bei allen Einstellungen gleich. Getestet mit Sony a7III. Ob der Weißabgleich bei anderen Herstellern das gleiche Ergebnis liefert, kann ich nicht sagen. Die Belichtungsmessung muß ich +1 korrigieren, um ein gleich hell belichtetes Bild zu erhalten. Die beigefügten Bilder sind in LR identisch entwickelt. Auch bei 24mm habe ich kein dunkles X. Die Schärfe leidet auch nicht.

I shoot photography semi professionally and needed a good CPL after watching YouTube reviews I popped on this for my canon t7 with EFS lenses it disappeared perfectly, stays on (sometimes to good can be a lil tough coming off), picture quality is great (I run manual always), hasn’t scratched or discolored yet it’s been like 2 years almost with near daily used mainly in the woods/nature, threads are okay that’s probably the only “2 complaints” if you’d call them such I have, first the lens cap (stock canon 58mm) do not hold onto the CPL so travel with caution and keep tabs on your lens cap or you’ll be buying more! And second it binds a little going on every now and then if they’d clean them up a shade and maybe get lens caps to hold tighter for travel this CPL would be and really is the best bang for the buck in my eyes! Yeah you can buy crazy expensive stuff but on a budget for non pro use definitely get you one! Once I finally do this one in I’ll be buying another. Oh and super important it comes in its own hard case for storage/travel with foam and it locks shut so it’s safe, I’ve had it in my camera bag and climber mountains and it’s stayed in the case no issues that’s definitely a plus i needed to mention.

This very light and compact endoscope camera comes in a hard case with a foam interior. The cable of the camera is about 5 meters long and has a diameter of 0.5 cm. Contrary to what is stated in the description, the camera is not equipped with 6 LEDs, but with 8. 6 LEDs light up on the front of the middle camera. 2 lights on the sides, each on the right and left. Cameras are also installed here. So you can look down (into the combustion chamber of the cylinder, for example) or switch on the camera on the right or left to look at the walls without having to turn the camera. Very good. The camera has a resolution of 1080p, i.e. Full HD, the recordings are stored on the 32 GB memory card supplied and can be called up at any time. The 4.3 inch display is equipped with hardened glass and is easy to read. The menu is tidy and logically structured. The language, resolution of the recordings, etc. can be set here. There are other LEDs on the side of the device that can also be turned on to act as a flashlight. The integrated 2600 mAh battery is charged via USB-C charging cable. A good choice for hobbyists and mechanics.

THREAD SEEMED MACHINED CORRECTLY, GOOD FIT ON MY 150 TO 500MM SIGMA ZOOM. i FOUND NO ISSUES WITH AUTO FOCUS WHEN PAIRED WITH MY NIKON Z7. POLARIZATION SEEMS EFFECTIVE AND i HAVE NOT NOTICED ANY DISTORION.