Hoya YYN3077 Variable Density II Filter ø77mm, BLACK: Amazon.co.uk: Electronics & Photo
Best variable ND filter - Camera Jabber
Zomei 77mm Fader Variable Nd Filter Adjustable Nd2 To Nd400 Nd2-400 Neutral Density For Canon Nikon Hoya Sony Camera Lens 77 Mm - Camera Filters - AliExpress
Used Hoya 77mm Variable Neutral Density (ND) Filter (0.45 to 2.7 (1.5 to 9 stops) A-77VDY
Hoya 77mm Variable Density II ND Filter – Pictureline
Hoya 77mm Variable ND Neutral Density ND3-ND400 Filter | Camera Centre UK