Many/most of these were shot with the Tamron on a 5DII in AI Servo, ISO3200. From all the talk about low light and the crappy focusing of the 5DII and the Tamron, these must be impossible 
http://www.bwkphotography.com …n-Montreal/11788144_uYCTk![]()
If I can set the camera to ISO3200, lens to f2.8 and there is enough light to get a shutter speed that I can handhold, that's all I ask for and the Tamrom delivers. I've never been tempted by the Canon.

