Good morning, Charlie;
Which Tek (Tektronix) oscilloscope camera did you get? There should be an identifying number on it. There were two major variants of them. The ones with the round nose fit onto the bezel or rim around the round 5 inch CRT of the old Tek oscilloscopes from the 1950s and 1960s, such as the 512, 535, 545b, 555, 575, and others. There are a couple of different rectangular nose cameras for use with the 1970s and 1980s oscilloscopes; the 223, 453, 475, 2215, the 7000 Series, and others. By the 1990s, the digital storage oscilloscopes had pretty much supplanted the oscilloscope cameras. I used a lot of the equipment that came out of the Beaverton, Oregon factory.
The early round nose cameras used the old Polaroid roll film packages. As I recall, the later ones began to use the 100 series pack films. The rectangular nose cameras all used the pack films. I ran a lot of 3000 ASA Type 47 roll film and Type 107 pack film through them.
And, I am not sure how you are going to use it. The Oscillo-Raptar lenses on them were optimized for very close focusing. You might find it difficult to achieve focus on a subject located at infinity. It will be interesting to see what a pin hole in its place will do.
Finally, under the heading of developments here (sorry about that), there is an old Kodak Quick Load 4 by 5 holder and a Fuji PA-45 Pack Film Holder here now for the 4 by 5 cameras.
Enjoy; Ralph, Latte Land, Washington