I have 2 questions for everyone.

1st which lens would you buy:

Sigma 135-400mm
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3876866005

Or a Minolta 100-400mm
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3878149055

2nd, one of the buyers on Ebay mentioned that there is a problem with the 7D and higher mm lenses. Anyone here this?