K&F Concept 67mm Variable Neutral Density Lens Filter ND8-ND2000 (3-11stop) Waterproof Adjustable ND Lens Filter with 24 Multi-Layer Coatings for Camera Lens (D-Series)

I am using this with my sigma 16mm lens and Sony A6400 so it’s work perfect so recommend to all

I wanted to be able to shoot off camera flash without having to use HSS (high speed sync), so i did a little research and came to the conclusion that I needed an ND Filter. There are a lot of options out there but I knew the price point I was comfortable staying in and this filter was the best blend for versatility (3-11 stops) and price. I didn't see the benefit in getting an ND filter with a smaller stop range such as 3-5 or 7-11 etc. This ND filter covers the entire range in one package. And the adjustment ring feels high quality and has really good feedback when stopping down or up. I saw some people complaining about the grid pattern you get sometimes when stopping down on other ND filters, but I haven't experienced that problem. This ND filter has been nothing but perfect for me. I was able to shoot at 11 AM with with harsh light and overpower the sun with my flash for a recent shoot while staying under 1/250 sec. I definitely recommend this ND filter if you need to stop down for whatever type of photography you're into.The only issue you may have with this ND filter is trying to use a lens hood with the filter as they may not fit with one another.

Stops of lights for this ND filter is not as accurate but still the value is fine for what you are paying

I've used it once and I paired it with a 10 stop ND filter with this and I was able to set my camera set at 30 seconds, f11 and ISO 50 in the middle of the day but with the 10 stop I could only get it to 10 seconds, f11, ISO 50. I was surprised to see that when I got home to edit the photos there was no noticeable loss in sharpness with both ND filters on and this being a variable ND filter they're notoriously known to be less sharp than a constant ND filter. I can't wait to test this out on a waterfall but being that it's summer in San Diego right now I'll have to wait to try it out but along the coast I prefer the 10 stop ND filter and being able to drag that shutter longer. The front of this variable ND filter is quite large so your lens hood won't fit on there which can be an issue with unwanted lens flares but the K&F 10 stop ND filter I used with this you're able to mount the lens hood still. I received this filter free of charge to test it out so take my review with a grain of salt but if you do choose to get this I highly recommend getting a 10 stop as well because you'll be limited to 2-3 second shutter speeds with this alone at it's darkest setting in the middle of the day where the sun is bright like it is here in Southern California. I forgot to mention that there are notches on the side and tells you the minimum - maximum darkness and each stop between so there isn't any guess work involved but I do like the fact that I was able to set my settings I wanted and just rotated the front element until my camera read that I was properly exposed.

Photos taken at f11, 1/125, iso100.Used 2 stops and 4 stops ND ( K&F )Be the judge.

I got the variable filter so I could 1. take pictures outdoors in bright light without messing with my f-stop. 2. Not have to have several filters with me.Pros:It's variable so I can adapt for whatever the outside throws at me.It's inexpensive compared to othersYou get a lot of stops to choose fromMight be able to use the max setting for solar eclipse portraits.Cons:It doesn't have any hard stops or clicks when your changing from one setting to another.Stops are denoted by Min, then boxes, then Max at the end but you can keep going beyond Max or before Min to basically do a 360 rotationSome vignetting at max (see sun picture).The various stops are only noted by boxes rather than numbers.Has a carrying case, but would rather have a pouch or something else.Basically all the cons are ways this thing could be improved Firstly I'd like to see some hard stops put in at min and max, and then noticeable feedback when you go from stop to stop. I get the smooth gliding MIGHT be used during filming or continual shots, but I doubt that.Ultimately, this filter will serve until I can afford a higher end one.