No x Factor no matter how strong the filter. I did not detect any chromatic distortion. Quality product at a very good price.
15.09.2021
I can confirm there was no black X mark on the images, works very well with my lenses. Make sure to remove the protective UV filter on your camera if you have one otherwise you will get some vignetting on the raw photo (which can obviously be adjusted post processing but it always good to have it done correctly first as it will save you time). I am using this filter on my 17-40mm and 24-105 canon lenses and it works perfectly with both of the lenses. I bought the 77mm version and it is definitely worth the money. Will give you some great shots in the daytime of waterfalls if you are into nature photography. A must have for long exposures.
14.09.2021
well worth the money. quickly delivered... pair this with a set of step down rings to cover all of your lenses, and you have the perfect enthusiast nd filter set up...
24.08.2021
I liked this K& F Concept variable filter lens 82mm. It helped me to control the amount of light going into Sony camera's sensor in daylight. The only issue which made me decided to rate it 4 stars is because the lens cap (52mm) does not fit on this filter lens.
24.08.2021