Quote Originally Posted by Sheiky
Hmm apperently you don't really mind the f4 aperture of your 300mm since the 500 f4L is in your list. Also will the 300mm f2.8 be much better for you than the 300mm f4L? Or would you have to sell the 300mm f4L to buy one of both? If I was photographing birds etc, no doubt I would go for the 500mm f4L. Anyway I'm interested in the outcome! Have fun Brendan! Sorry Mike for not giving you a good fight [img]/emoticons/emotion-4.gif[/img]

I don't mind f/4 at all. In fact for many bird shots f/4 will give you a DoF undesirably thin. Which is why the 500 is a more logical choice, but f/2.8 is a plus and the 300 is more handholdable.