LightCraft Workshop Digi Pro ND + Rubber Lens Hood

Link: These Variable ND filters can be pretty expensive, so by using cheap step up filters, they can be adapted to fit many of your other lenses. Since you won't be able to use the standard hood, a cheaper alternative to Matte Boxes lens shades are these cheap folding rubber lens hood.

Step up filters can be purchased for around $1 dollar.
Rubber lens hoods start at around $2 dollars. More information at