GND8 Filter, K&F Concept Soft Graduated Neutral Density Filter Square ND8(0.9/3 Stops) 100 * 150 * 2.0mm Optical Glass GND Slim HD MRC Coating Waterproof

I haven't had the change to do real world testing yet but I've taken a few test shots in my garden to check for loss of sharpness and color casting. I used a macro lens for checking fine detail and wide angle to see if its consistent across the frame. I also checked it against my Lee Filters big stopper.I couldn't find any percievable loss of sharpness across the entire frame with the macro or wide angle.There is a bit of a color cast to it from looking at the exif data but shooting in raw the camera adjusted it out for the most part and can be edited out manually if required. Importantly though it seems to be consistent across the entire frame, even at 10mm on my apsc sensor.I did experience vinetting on the wide angle (both 10mm and 22mm) but again it can be edited out very quickly in lightroom.It would have been nice if it came with a light gasket supplied with it but for the massive price difference compared to the bigger brands I can forgive them for that. They can be purchased online elsewhere if required which is what I'll be doing.Overall I'm pretty happy with it, which is just as well really as it managed the slip through my Lee Filters folder when I wasn't paying attention and drop onto the paving slabs in my garden, which chipped the corners of the glass. That's my own fault though as it's a known issue I have with the holder, I experience the same problem with my Nisi filters in my holder so I think it's a bit worn out.

These are not cheap but comapred to Lee Filters a bargain. The filter holder is excellent, and is supplied with multiple adapter rings, which are £26 each from Lee. I can see no significant colour cast. So if you want to experiment with proper filters without breaking the bank these are a good buy. The filter cases are beautiful and the whole product presentation/packaging oozes quality.

Excellent with little colour shift which isn't really relevant with post processing. Found it a fraction out in real world testing in stops and no great loss in sharpness but I'm just nick picking. Do your own tests to find the perfect settings. At the price it's good enough for most photographers.

sorry not managed to use it yet

After looking at competitors and trying brand names one, found these at the fraction of the price, without a compromise with quality. The entire user experience from delivery is exceptional. You are very much buying a high-end product without the overpriced name brand. I bought these to help with my landscape photography, and they work exceptionally well with my Sony A7iii. The camera practically sees at night, to get a long exposure without this filter was incredibly difficult I would often have a very split picture with the moon/sun being very bright on the top end and the everything below the sky in complete darkness. After using the graduated filter, any additional adjustments happened at a snap. The material feels very sturdy, although I don't plan on testing the limits, I do believe that it is scratch-resistant. Looking forward to sunsets come spring to test this out further.