16mm test film.
- aspect ratios (super 16, anamorphic prints)
- single perf or double perf
- emulsion in or out
- sound formats
16mm Aspect Ratios
The 16mm frame has a native full-frame aspect ratio of ~1.34:1. This is the aspect ratio of the vast majority of 16mm prints. 16mm was historically used for the distribution of Hollywood releases to nontheatrical venues (schools, prisons, summer camps, etc.) as well as for television broadcast. Further variations related to aspect ratio crop up on prints that were used for these purposes. These include simple cropping of widescreen or CinemaScope images to 16mm's native 1.33 as well as "pan and scan" efforts.
Other 16mm aspect ratios exist, however. Some prints are hard-matted to widescreen aspect ratios like 1.85 and 1.66 (this is seen with some frequency on 16mm reductions of widescreen feature films originally released on 35mm). The same lens and plate is used for hard matted 16mm prints, you'll just see black on the top and bottom of the image on screen.
Anamorphic 16mm prints
These have an aspect ratio of 2.66:1 (because of the native 1.33 aspect ratio of the frame). Note that this means that anamorphic 16mm reductions of films originally released as 35mm anamorphic will be cropped slightly at the top and bottom of the frame! Proper projection of anamorphic 16mm prints require an anamorphic lens.