I am looking at the Tamron 70-300 VC, the Canon 70-300 IS and the Canon 70-200 f/4L. I would love the 70-200 f/4L, but it doesn't have IS and I cannot afford the IS version. I was then looking at the Canon 70-300 IS, but it has a rotating front element and doesn't have full time manual focus. That's when I stumbled upon the Tamron 70-300 VC. I am fairly sure that this lens fits my desires, but how does it actually perform in relation to these two lenses, and am I making the correct choice?



