canonguy14 wrote in post #13848413
I think this question is better suited for the Equipment Talk section of the forum. You might get more views and responses there.
I'll answer anyway.
Oppss and thanks 
canonguy14 wrote in post #13848413
Between the 18-55 and the 55-250, you have a pretty wide focal range that you are already covering.
With your T3i and these 2 lenses, I really don't think you need to go spend big bucks on another lens.
Good to know! I thought this as well, but wasn't sure.. If I did need different lenses, I was considering renting them for the shoot - they're pretty cheap actually 
canonguy14 wrote in post #13848413
#1 Is this a paid gig or does it have the potential to be a paid gig?
#2 What is limiting you with your current lenses that you feel you need to upgrade?
#3 If you were to go out and buy a lens, my recommendation would be the 50mm f/1.8 II. A great prime lens that will give you the opportunity to shoot in low light situations if needed. Also, it can be had for around $100.
1. Yes, There is profit to be made. I will take pictures of kids and the class photos and make profit on the order overall.
2.None! Considering this is a new shoot for me, I wanted to be sure I had sufficient gear, but I do love the lenses I have. I use them for nearly everything and I'm very satisfied with the results.
3.Any links to exact lenses? Would this be a lens that will require an adapter to fit the t31? I've purchased a Hexanon 50mm f1.8 for my Oly e-pl1, but it's a fixed lens. Same lens?
Thanks for your help - it's very much appreciated!