Will Tamron set the bar for a budget wildlife lens?

[JacaRanda]

One thing about the powerful magnification zooms it really shows how steady you are. Turn off the IS and let the fun begin.:mrgreen: I turned off the IS a couple times with the sigma @ 500mm trying zero in on a tiny bird like a nuthatch or chickadee I was getting dizzy from all the motion.

Haaaa, reminds me of this .