This was announced as prototype during PMA 2007, but I just found out about it last night. So, I figured I'd throw this link up for you. So, here it is folks, Sigma 200-500mm f/2.8 super telephoto zoom lens. That is by far the biggest lens, I've ever seen. It is absolutely huge. HUGE. HUGE. I want one. But it's not available quite yet, to my knowledge.