Also, due to how you asked the second question, it leads me to think you have not learned the relationship between apature and dept of field. While stepping back is a way to increase the amount of depth in focus, a much better way to deal with it, is with a smaller apature, like f5.6 or something.
I know the relationship between aperture and depth of field, but I don't know much about the 24-70 lens, and I wasn't sure if the aperture was fixed at 2.8, so since I wasn't sure if I could adjust it, I wanted to know how far away I would need to stand to shoot. Also, I was originally worried about distortion (from standing too far away and shooting at 24mm), but since 24mm is more like 30something on a crop, I'm not sure if I need to worry much. Would I?? Thank you for the depth of field calculator! I'm going to play around with it right now.
Thank you for all of your advice; I appreciate it! You guys always give me so much to think about. I like that.
I like the idea of a 35mm. Do people shoot a lot of group shots on a 35? I don't know, I have a fondness for primes I guess!
Really?? By that reasoning 50mm is the only FL you should ever use. The OP has a crop, so that's an equivalent FOV to an 80mm on FF. He'll be standing a long way away for group shots.
Ahhh yes, I had the same thought. I bought my lens from a 'mom and pop shop' and one of the girls working there told me the same thing about the 50 (that it was the same focal length that the human eye sees), and while that may be true (I'd never really thought about it), in my head I was thinking "but I have a crop..." it's a little long!