That sounds great. Yeah, I know that dropping the two f stops will definately not work well for football under the lights, but that's the beauty of this setup. It wouldn't work with the straight 400 either, because that's a 5.6 as well. I don't have the money for a 2.8 400mm at all. I need to start making money on my pics first. haha As I'm just getting started, I want to buy lenses that are worth it, but that I don't have to sell internal organs for.


So in that case, of the football game under the lights, at least I could get rid of the extender, and at least get the speed of that 2.8 lens, that way I could at least the shots clear. The 50D has 15 megapixlels to play with, so if I put a good lens like that on, at least I could crop down pretty well.


I'd love to see what the pics look like. I was worried about chromatic abberation, as that's one thing I heard about using extenders, but we're talking about a really good sharp lens, not just a cheap lens, so I feel it's still going to provide all but the best shots with the extender.


Thanks for your reply. Now that I have that info, I think you helped me dedcide on what to do. Justhaving someone who actually uses that setup withgood results is really what I wanted to hear.


I look forward to your email! (Will private message the address.)


Also, I appreciate any other comments anyone else has to offer! Thanks everyone!