I know that most people here have a good handle on what they're doing,
but I've always found it useful to read another person's take on a
subject, especially if I thought I knew all about it. Amazing how much
we know for a fact that just ain't so. ;-)
So, in the spirit of General Clarification and Debunking of Common
Nonsense, I offer this link. I think the website is very useful - clears
up misconceptions, and the writing is a model of clarity.
http://www.rideau-info.com/photos/index.html
Enjoy!
--
wolf k.