I'm shooting with a 60D and Tamron 18-270mm. I noticed that the Tamron gets blurred images the closer you get to 270mm. I was thinking of playing with the big boys and girls and getting a Canon 24-105mm F4L IS EF. Will this be a waste of money to put it on the 60D f/1.6 crop versus the full sensor?
Are any cheat cards available for the Canon 60D?
Thanks for the help.