70-200 f/4 or 2.8?

[cfusionpm]

The f/2.8 non-IS is a 15 year old design which shows in that comparison. But compared to the only-10-year-old 2.8 IS (here) and brand new 2.8 IS II (here) the difference is not that much (if any).

That being said, to the OP, I would say save up your cash as much you can and get the 2.8 IS II. It's regarded as one of the best zoom lenses available today.

 

[haring]

Get the 2.8. or buy the canon 135mm 2.0.