Looney 11 & Sunny 16
For astronomical photos of the Moon's surface, set aperture to f/11 and shutter speed to the [reciprocal of the] ISO film speed [or ISO setting]."
With ISO 100 film / setting in the camera, one sets the aperture to f/11 and the shutter speed to 1/100 or 1/125 second (on some cameras 1/125 second is the available setting nearest to 1/100 second).
With ISO 200 film / setting and aperture at f/11, set shutter speed to 1/200 or 1/250.
With ISO 400 film / setting and aperture at f/11, set shutter speed to 1/400 or 1/500.
Sunny 16
On a sunny day and with ISO 100 film / setting in the camera, one sets the aperture to f/16 and the shutter speed to 1/100 or 1/125
On a sunny day with ISO 200 film / setting and aperture at f/16, set shutter speed to 1/200 or 1/250.
On a sunny day with ISO 400 film / setting and aperture at f/16, set shutter speed to 1/400 or 1/500.
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