one more.....?

[eve adams]

I have 2 more questions.

I was interested in the wedding photography, art business and style, I'm wanting to get that one, but it's been revised, which one is better?

2. I have a 10d, and am using my 540 on M. It is time consuming looking on the back and seeing the distance covered, it was much easier to look at my 3rd party flash with the chart on it, and say, oh, x feet, i want it one stop under so i use x. Also if i have it wide open for portraits, and i'm using my flash on m, i can only power it down so much, and it doesn't seem to want to show me the distance. What is the best and fastest way to do these figures on the fly, the mathematical way, gn/fstop=distance or what?