I wasn’t sure how these photos would turn out given the age of the film; this roll of Perutz PR 200 expired in 1992. Assuming I would need to compensate for the film’s age by adding one stop for every decade past expiration, I estimated that I should shoot this roll at ISO 25. All my 110 cameras are essentially point & shoot cameras with no way to control exposure, so I only took photos when the lighting conditions matched the Diana Baby’s aperture and shutter speed for ISO 25. It worked!