Bought it to shoot the eclipse today against all advice saying not to use ND filters. The results speak for themselves.Nikon D5100 w/ DX 55-300mm + Tiffen UV filter + K&F Concept 58mm ND Fader
21.08.2017
Wasn't sure about the variable fader, concerned it wasn't strong enough.Excellent quality and performance, easiest handling. Took photos of partial solar eclipse and even direct sunlight. Simple twisting adjusts brightness from next-to-fully transparent to pitch-black. Never seen such a thing.This is a must-have item for creative photography. Arrived quickly.
21.08.2017
went cheap with this one instead of the normal brands at a higher cost. The quality here is not the same and it struggles in bright sunlight (i.e. when you would use a ND filter for video). Will hold on to it for in a pinch use but will be buying a higher quality one soon.
20.08.2017
Simple to use, even with no instructions. Not happy with the ghosting of bright light, but will figure how to work around it. Pictures are nicely enhanced, colors are vivid.
19.08.2017
I guess for the price this is ok. It does work and is sorta smooth but compared to more expensive versions it is far less smooth feeling. Optically I cannot say if this KF model is ok but I would say as a back up VND it is decent. When you twist it there is a bit of a grinding feel to it. I am not sure that gritty feel will go away in time or not. Now compared to housebrands I have tried from large photo stores I would say this product is better and cheaper. BUT compared to a Tiffen for over $100 this KF is not quite as smooth. Optics don't know.
30.06.2017
These are great unless you are zooming in a good amount. When you zoom in there is a noticeable loss of sharpness. On a M43 camera, when i zoom past 30mm it starts to get a little soft. At 140mm, the footage was almost unusable.
29.06.2017