Favorite Hitchcock Shot?

[Harry Lime]

Other than the obvious Fog Filter?

Exactly.

With all due respect to Mr. Burks I also found the 'no filtration' claim to be a little difficult to swallow.

A few years ago I tried to emulate that look. I ended up using a combination of Harrison&Harrison double fog, Pancro Mitchell diffusion filters and a stocking over the front of a Super Baltar. That's a little more then 'no diffusion'...