Reviews
This true color filter is much better, though still a NANO-K series
Among many K&F Concept variable ND filters, the NANO-K series is perhaps at very low end of the price range. I do a LED light reflection test for all filters. The K series variable ND filter is in blue color, which is not good. The picture color shift is very obvious, and for me it is almost unusable. Now, this is a true color variable ND filter, though it is still a NANO-K series filter. The LED light test makes a green color, similar to some true color ND filters from other manufacturers. And there is almost no color shift, so it is very usable. For people prefer K&F filters, it is good enough, but if you like to try other true color variable ND filters for some less-known brands, and at the similar prices, you might find better ones.
24/02/2026
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