check out this telephoto lens

I'll check into that there should be something like that available and thanks for the tip. Is that anything like a converter, I had thought about that but then you multiply the fstop also but not that big a deal cause your on a tripod anyway, I think before I try that i'll practice on it like it is but I will look into a extension tube as you suggest. We have eagles around here in Northern Wisconsin or seagulls is about the only birds this time of year.