I'm looking into getting a new lens, Canon 70-200 f/4 IS or 70-200 f/2.8 non-IS? They are virtually the same price. Or should I buy the 70-200 f/4 non-IS and have a few bucks left over for more toys? I want to do mainly sports shooting, mostly outdoor biking and skiing. But I wouldn't mind something to do a bit of indoor hockey shooting.
Thanks
The 2.8 has the advantage of one stop of light extra, but that's it. Its years old and doesnt have weathing sealing, no rounded aperture blades. Its heavy.
The F/4 IS version is a really nice camera, one of the sharpest lens canon makes. The IS is also excellent. This version does have weather sealing (to be used with a weather sealed body), has rounded aperture blades (better/softer blur). MUCH lighter (by half?). Easily hand-holdable.
F/4 non-IS is really cheap, the cheapest "L" lens available by canon. Its years old (no weather sealing, no IS). Its still pretty sharp, but not like the IS version.
It is really up to you. The 2.8 IS version is the most popular, but pretty darn expensive. I think the F/4 IS is the second most popular version.
I personally have the F/2.8 non-IS and I do have some really sharp images (granted, I was using F/4 and F/5.6) as it was a bright day at soccer game. If I could, I would own both lenses, simply for the sharpness and lack of weight.
The F/4 IS is simply an amazing lens. You can't go wrong with it.