That is my primary lens, back by a 70-200 2.8 IS for long shots, this lens really gives outstanding images, but the 24mm is totally useless when using the Fader ND. Thus being said I glued the Fader ND to my 70-200. Oh! and I use a 82mm Metal Tele -Lens Hood, since there's no way of using Canon hoods.

In what way is it totally useless? I use a Fader ND on both a 24mm F1.4L & a 24-105mm F4L & it is great.

I have the lens hood mounted and the vignettes was so huge, but is fine when the hood is not mounted. I will rephrase this that the 24mm is useless when using Fader ND w/lens hood mounted.

Nigel:

I am happy to report that I barely get any vignetting with the Fader ND on the Canon 17-40 f4 L at 17mm. The vignetting is more noticeable on the screen, but it almost all occurs in the bars on the screen. I need to shoot some tests and view on a real HD screen to check the corners.

At 18 or 19mm, definitely no vignetting. My first Fader ND was broken, I am waiting for Boniface to send the replacement and a 58mm version for the 70-300 f4-5.6 IS. They arrive next week.

Dan