A couple people have pointed out that the link below is to the https (secure) server on my site, which is something I did without paying much attention to. Since I use a self-signed SSL certificate, many browsers ``helpfully'' warn that there's no way of knowing that I am who I say I am. You can access the exact same document without the warnings here: http://trumpetpower.com/photos/Exposure b& Original message follows: Here: https://trumpetpower.com/photos/Exposure is a first attempt at a document I've been meaning to write for a while. I'm afraid I don't have the time right now to further put into refining it; it's much too long and ideally needs to be broken apart and probably have different parts re-written multiple times tailored for different audiences -- and I *really* don't have the time for that sort of thing. But, still, I hope it answers many of the questions I've had asked of me of late Cheers, b&