TMR Design wrote in post #11043995
So it would seem that unless you're going to use wide angle lenses and wide apertures, the standard Vari ND with front and rear threads is the better choice. The thin mount is appealing but doesn't allow for any stacking of filters or use of a standard lens cap.
Pros or cons of the thin mount? This is my comment about thin mounts in genera and not specific to the Vari ND filter. I bought a thin mount polariser filter for the same reason, i.e. for use with wide angle lens. But, unless you have a full frame camera or have a "made for APC format" wide angle lens, vignetting won't really be an issue with the standard filter. But the fact that you can't use your normal lens cap with the thin filter is a bigger bummer, at least for me. The rubber Tupperware-type cap that's provided with the filter, if one comes with it, is practically useless cuz it keeps falling off! 