After researching this forum I am leaning towards the EF 100-300mm for shooting outdoor sports but then came across this lens (Canon Mt. 100-400mm) and wanted to get opinions about the two in comparison.
http://cgi.ebay.com …4687&item=7517711539&rd=1![]()
Is this the 100-400mm that the "top 10 polls" show so much support for?





