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Brent Clark

Brent Clark's Public Library

Mar 30, 16

"LOONEY 11 RULE:

The “looney 11 rule” states that 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, one sets the aperture to f/11 and the shutter speed to 1/100 or 1/125 second.
With ISO 200, aperture at f/11, set shutter speed to 1/200 or 1/250.
With ISO 400, aperture at f/11, set shutter speed to 1/400 or 1/500."

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