Half frame cameras allow you to take two photos on one standard 35mm frame. This means that you can take 72 photos on one roll of film instead of the standard 36 and 48 on a normal 24 exposureThe amount of light that reaches the film (or camera sensor). It determines how light or dark an image is. The exposure of an image is determined by the aperture, shutter speed, and film speed (ISO). During exposure, the sensors or chemicals on the film in analogue models, are subjected to the light outside the camera for a certain time. More film. The frames are in portrait rather than landscape. OlympusOlympus introduced its first camera in 1936, the Semi-Olympus I, fitted with the first Zuiko-branded lens. The first innovative camera series from Olympus was the Pen, launched in 1959. The half-frame format, allowing 72 pictures of 18 × 24 mm format on a standard 36-exposure roll of film, made Pen cameras compact and portable for their time. Pixel More is probably the most well known manufacturer is OlympusOlympus introduced its first camera in 1936, the Semi-Olympus I, fitted with the first Zuiko-branded lens. The first innovative camera series from Olympus was the Pen, launched in 1959. The half-frame format, allowing 72 pictures of 18 × 24 mm format on a standard 36-exposure roll of film, made Pen cameras compact and portable for their time. Pixel More with its Pen range – Pen-F, Pen EE, etc.