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.

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 others You get a lot of stops to choose from Might 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 rotation Some 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.

am very pleased with this 67mm ND filter from K & F Concept. I am using this on a Sony 24mm 1.4 G Master lens (Bonus it will also fit on my 85mm lens). This is great for time lapse photography during the bright afternoons in Florida. Examples of the scenes I've shot are, the summer rains coming through over the water, or of the city scenes at the urban farmers markets, etc., this filter has exceeded my expectations. I purchased at medium sized backpack from K & F 2 years ago that has been a hearty addition. The backpack has protected my gear on trips to Thailand, Hong Kong, Philippines, and Colombia. So, I figured why not try their other products. I'm looking forward to using these filters for many years to come. Great buy at a great price.

From the packaging and presentation to the build quality and functionality, this is a very solid purchase. I am very pleased with this filter and plan to order more from K&F Concept in the future.

this is perfect if you take photos during peak sunlight. It basically gives your camera sunglasses. the filter quality is great and doesn't degrade the quality of your photo. If you've ever taking a photo outside and everything looked dark then you need an ND filter. I used this on the RF35mm f1.8 and noticed a little vignetting but this can be corrected in post. Since it's variable you can adjust the filter on the fly depending on how much light there is. The adjustment goes completely around so if you spin it all the way one way it'll take you from light to dark since there's no hard stop. It also comes with its own hard case so you can store it away in your camera bag without worry.

Its great quality dynamic range all in one ND filter, perfect fit on Nikon D750. It adds great value in Natural Photography by adding dramatic effects through controlling light intensity from low to higher or higher to low range with just one filter being installed on the lens.

Best price and quality first class

was skeptical purchasing a filter that was on the cheaper end, and boy did this deliver! Bought for a vacation to capture long exposures in direct light and it works great! Adjustable apature ring, highly recommend!

Great quality for a decent price

If you're wondering to buy or not this filter or not... just buy it! It works very nice in very harsh sunlight situations