Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site utcsri.UUCP Path: utzoo!utcsri!hofbauer From: hofbauer@utcsri.UUCP (John Hofbauer) Newsgroups: net.rec.photo,net.columbia Subject: Re: What kind of film do the astronauts use? Message-ID: <2207@utcsri.UUCP> Date: Tue, 25-Feb-86 19:12:43 EST Article-I.D.: utcsri.2207 Posted: Tue Feb 25 19:12:43 1986 Date-Received: Tue, 25-Feb-86 19:19:30 EST References: <1086@decwrl.DEC.COM> <1972@peora.UUCP> <510@tekig4.UUCP> Organization: CSRI, University of Toronto Lines: 29 > fit a Hasselblad. Also, the Hasselblad couldn't be being used for moving > pictures, could it? Sure it could. Film is film is film. The 35mm film you use in your favourite SLR is fundamentally the same as used in making feature films. There are even mail order companies which repackage movie film for use in still cameras. They advertise it my its code number: 5257, or some such number. It was because of the availability of 35mm movie film that Oskar Barnack built a small still camera around it back in 1913. You might have heard of it. It was (and still is) called the LEICA. To get a bigger negative, he doubled the standard 24 x 18 mm movie frame to make it 24 x 36 mm. This was reasonable because film travels vertically through a movie camera and horizontally through a still camera. So if you adapt a still camera to produce frames of 24 x 18 mm with the proper spacing between them and then run the film through a projector you can't tell the difference. This is, of course, how animation and special effects are done. The idea of having movie film travel horizontally through a movie camera has been re-invented a couple of times. In the 1950's Paramount had a process called VistaVision. This was a widescreen process in which 35mm film travelled through the movie camera horizontally thereby producing a larger negative since the shorter image "height" dimension was the 24mm between the sprocket holes. IMAX uses the same technique but has stepped up to 70mm film. Naturally this produces a larger frame than standard vertical travelling 70mm film. Given the same size viewing screen, the larger the frame the clearer the image because less enlargement is needed.