Hoya (5 products at store)

The PROND100 has a 6 2/3-stop light reduction equal to a ND optical density of approx. 2.1.

Neutral density filter that reduces the light to an equivalent of 10 f-stops. Series for both photographers and filmmakers

Neutral density filter that reduces the light to an equivalent of 6 f-stops. Series for both photographers and filmmakers

Neutral density filter that reduces the light to an equivalent of 3 f-stops. Series for both photographers and filmmakers

A density adjustable filter with an ND range from 1.5 to 9 f-stops (ND3-400)