I had lunch over at the Coral Cafe in Burbank with Jim Stewart last week and we started talking about film formats. I have been working with super35mm (and super 1:85) plates recently and it was on my mind. Since I am a creature of the digital world, I have never worked on a common top plate – only common center. Jim, being an film optical guy has had many common top jobs.
To preface this entry, Super 35 describes a film format where 35mm motion picture film is exposed side to side (L-R) on full aperture. It is anamorphic (squeezed) but the image is exposed on set using flat lenses. The anamorphic process would be introduced in the final step of printing an intermediate for release printing. Jim Cameron was a big proponent and I think because of his reputation the format found much favor even to this day.
This was never a standardized format unfortunately. It depends upon the ground glass in the camera to guide the framing and both the glass and camera can differ based on manufacturers. The differences in ground glass and manufacturers created framing issues which sometimes weren’t noticed until post production. Because of camera differences, a DP should have shot a frame leader (a frame chart shot on film using the ground glass/camera used on set) but it didn’t always help. Production never has enough time to do this kind of preplanning especially if there were multiple cameras and rental houses.
My friend Pete Kuran had this to say.
“The problem was whether you were using “common center” or ‘common topline.’ Cameron used common topline when shooting Terminator 2. This is the most natural way to shoot super 35 because head shots are framed toward the top of the frame. This framing can then be opened up to naturally fit a 4×3 or full frame image as well.
The problem with shooting common center, as was done on Star Trek IV (or was it V) was that often the framing was such as to get the boom mike visible in the frame because a lot of head room is generated from this formatting.”
Jim told me that during the optical days there were gotchas that occurred for inexperienced producers because Super 35 required some foresight as to how it was going to be projected. An inexperienced producer would hear the DP say that he is shooting it just like Cameron and not know that when the film was posted for a theatrical 1:85 release that there was a framing issue which had to be solved. That was where people like Jim came in; repositioning the film optically.
As you can see, the overall problem with super 35 was with the choices made by the DP on the set decisions. Tiny choices made on set would have huge repercussions when the film reached the optical stage.
Of course, since the image is exposed flat, the optical printer does not have to squeeze the final result prior to the release print. As Pete said, if you are willing to accept a slight cropping on the side you can also have a flat 4:3 print made.
What does that mean to an effects artist? Not too much because you are usually getting your scans at full aperture. You will get a frame guide from your super and either work to the guide or to the full frame. The best thing about this anamorphic format is that the scan you receive is flat and not squeezed. Working with anamorphic files can be painful. The greater surface area of the exposed image is attained by excluding soundtrack so the useful image extends (basically) from horizontal edge to edge.
