- Sell your 55-250, and purchase the EF 70-200 f/4L (non IS) $629 today at B&H. For outdoor sports, wildlife, etc. You don't need IS for sports because your shutter speed will need to be approx 1/500 and at that point IS isn't going to add value. This is one of the best value L lenses and one of the sharpest 70-200 lenses.
No. Although the 70-200 f/4 L (non-IS) is really good (I have one), it's not ideal for indoor sports. And more so if you're shooting with a Rebel. Do those still max out at ISO 1600? If so, you're not going to get near enough shutter speed in the average gym. Choir concerts will be even worse.
I'm still saying that a 135mm f/2 L is your best bet for those things, especially if you don't have the coin for a 70-200 f/2.8 L non-IS.
The t4i shoots up to 6400 iso. It appears with a side job I just landed this morning, the 70-200 2.8 non IS will be in reach.