We bought new camera to our collection and it’s Olympus Trip 35 – camera that been created and introduced in 1967. The auto-exposure mechanism is effectively solar-powered! You just need to choose aperture, distance and ISO of your film.
Lens/aperture: 40mm f/2.8-f/22 Zuiko
Shutter Speed: 1/200th or 1/40th of a second and we get a perfect exposure. When the camera’s incapable of making an acceptable exposure, a little red flag shows up in the viewfinder and the shutter locks out.
ASA/ISO: 25, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, and 400. The camera then makes the necessary adjustments for the shutter speed.
Official manual here