Quote Originally Posted by Mark_S View Post
I mostly use sunny 16 in situations where meters don't work - examples of where I have used Sunny 16 would include twilight exposures with a full moon where I wanted to capture detail on the moon - I figure that the moon is in full sunlight, so on a clear night, sunny 16 will give me a good exposure for the moon itself, and it worked.

Also, shooting Las Vegas at night - meter is useless because of the huge contrast in the scene - I mostly want to capture the neon lights, and those hold up well in daylight, so I figure that the exposure is sunny-16, perhaps a bit more - and voila, it worked.
For available light photography, I started using this slide rule http://www.stacken.kth.se/~maxz/files/jiffy.pdf published around 1963 or 1964 in Modern Photography Magazine. I have found that its recommendations have been spot on for me, but then again I only have four plus decades with it, so more experience may be needed.