Almost all 1.85:1 films were shot Full aperture 4-perf 35mm film. Today, almost all such movies are shot on 16:9 digital and then slightly cropped from top and bottom to create 1.85:1 DCPs.
Godfather series, Jurassic Park series, etc were all shot full frame then masked vertically during projection. Most of those films were put on VHS and then DVD with virtually the entire filmed image as “Full Screen” editions, because television was 4:3 back then, which is basically same as 4-perf full aperture aspect ratio.
Even widescreen films like Terminator 2, Titanic, True Lies were shot on super 35mm, which gives a usable area of about 1.66:1, and has a common top framing. The bottom image is unusable as far as I understand. Then they were cropped and given an anamorphic squeeze optically during the internegative stage of processing. The release prints contained this 2:1 anamorphic squeezed image that was then un-squeezed by a special lens during projection, to fill the entire cinemascope screen.