PhotoBanter.com - View Single Post - Variable Density Greyscale Film for audio

**peterh5322** · September 21st 06, 05:12 PM posted to rec.photo.film+labs,rec.arts.movies.tech

On 2006-09-21 07:25:46 -0700, (Scott Dorsey) said:

I would not be surprised if there are some folks with the WECO and RCA
sound cameras that still had a VD mode to them. Quite honestly, if
you just stick a diffuser behind the slit, you get VD.

The optical path is the same, but differs by one lens element.

Only Marurer had a path which was selectable by the user.

With the others, you interchaged the valve and its optical system.