Thanks, that is very helpful, so just past 24mm you don't get any more vignetting?
At the moment the lens with the biggest filter thread I own is the 500PF. I doubt I would ever buy the 14-24MM, which has the 112 MM thread.
I'm a bit afraid that if I buy the 95, or the 112 set (which is so expensive :O), the bigger size would take away from the ease of use of the magnetic filters,
as one would have to faff with the step up ring, which I cannot leave on the 24-70mm if I ever want to use the lenshood?