wondering if anyone could help me
Ive just started the BA[Hons] in Wildlife Photography at Blackpool and I'm considering buying a new lens that would help me on the course.
I currently use a Canon 350D and I have the standard lens that came with the camera and I also have a Tamron 18-200 f3.5-6.3 Macro lens.
I do really love the lens and I plan on keeping it however especially doing Wildlife Photography I feel like it doesn't have enough range..there have been so many times where I have needed a longer lens
There are 2 lenses I am looking at getting, one is the Bigma, a lens I know a lot of you guys use

My uncle is a photographer too and he is willing to sell me his for £400, he has only used it 3 times so I think that is a very good deal

I've also just seen the Canon 400mm f5.6 L, which I have had read a few reviews on and it also seems like an extremely good lens for what I want to do.
Any of you have an opinion on the lenses and if so which one do you think I should consider more?
Thanks!