Here are some lenses that I'm looking at
Tamron... http://cgi.ebay.com/ws/eBayISAPI.dll...MakeTrack=true

Sigma... http://cgi.ebay.com/ws/eBayISAPI.dll...MEWA%3AIT&rd=1

Opteka 500mm...and this cheaper lens is where I really need to know something about. I'm sure it is not for me because it is to cheap to be true, but I'll ask why anyway! http://cgi.ebay.com/500mm-HD-Mirror-...QQcmdZViewItem

I'm leaving on a month long vacation this Friday, so I'm making up my mind this weekend. Hopefully with good advice!

Thanks, Kevin