Archived posting to the Leica Users Group, 1997/09/26
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]> > >The reason it doesn't apply is that as you move twice as far away from a > >subject you will only get one quarter of the light from each square > >centimeter on the subject, but you will also cover 4 times as many square > >centimeters, so the result is that the exposure doesn't change. > > Interesting. But the point is, the sunny 16 rule works with the moon. It's > a subject in bright sunlight. > > The sunny 16 rule DOES apply when taking pictures of the moon, it's the inverse square law that doesn't apply when taking pictures of the moon (but it does apply when using the moon as a light source). The interesting thing about using the sunny 16 rule with the moon as a subject is that the reflection of the light off the subject (the moon) takes place before the absorbsion of light by the earth's atmosphere unlike with subjects on earth. If you were an astronaught on the moon the sunny 16 rule would not work because the light would not pass through the earth's atmosphere.