K&F Concept 37mm ND Filter Variable Fader NDX Neutral Density Adjustable ND2 to ND400 Lens Filter Kit + Cleaning Cloth for Cameras Lens

I use this with good quality step rings so I can hot swap it through prime lenses. Saves buying all different sizes. Make sure you get good quality step rings though or you will have permanent additions to your filter... Very good quality ND. Like it says, no 'X' cross at any setting. Smooth to adjust but stays in place at the ND you want. Colours are consistent. Stays in my bag at all times.

Bought it but it's not much helpful for me as a videographer.i am using it on sony a7s3. It 10 stop I mean kind of very dark and there a vintage in left upper portion even I dropped to f1.8 iso640 and 1/100 still. And it's very annoying when you facing towards sun completely balck the vintage is allover. Won't recommend it. Or maybe I don't understand this product use.if I am wrong I will change my review.i tried it it's very dark and I will try now 6 tops nd filter

Good

I m happy about this 10 stop ND filter it’s good for long exposure photography

You can only use this for video if there's heavy sunlight, for photo it's great anytime during the day.

Der Filter lässt sich gut aufdrehen und wieder abnehmen. Ich konnte keine Farbverschiebungen feststellen. Die Fotos sind scharf. Ich habe eine Sony A7Rii mit 42 MP genutzt. Daher meine volle Empfehlung.

Buone prestazioni per un prezzo entry level. Consigliato, da avere con sé se si vogliono fare riprese video in manuale ed anche per effetti fotografici.

Very high quality.

Es una buena opcion para aventurarse en la fotografia de larga esposicion sin gastar mucho!! No viñetea y no altera los colores. Recomendable!!

Probé el filtro ND variable Nano-B de K&F Concept (ND2-400, 9 pasos) y, en general, me pareció un accesorio muy sólido. El material se siente de gran calidad, con buen acabado y un ajuste preciso al lente. Cumple perfectamente su función para controlar la exposición en fotografía y video, especialmente en días de mucha luz o cuando se busca lograr largas exposiciones durante el día. Eso sí, al llevarlo al máximo de su rango empieza a generar una viñeta visible y la densidad no se mantiene del todo uniforme. Sin embargo, evitando ese punto extremo, ofrece resultados muy limpios y consistentes. En resumen, es un filtro confiable y versátil, ideal para quienes buscan un control flexible de la luz sin comprometer la calidad de imagen.