I also have been very pleased with my Tammy 18-270. Although it is a super zoom, I have gotten some pretty sharp images even at the 270 focal length. I recently got a Nikon prime 35 f/1.8 and I was going to compare the sharpness at the 35 mm focal length between the two. No doubt the prime will be better in low light but I bet the Tamron zoom will be pretty good on the sharpness comparison. The Tammy is a very nice walk around all purpose lens when you only want to bring your camera and one lens.
I also have been very pleased with my Tammy 18-270... (show quote)
Haven't tried the 16-300 so cant comment on it but I do own the Tammy 18-270 and am very happy with the images it produces. It is my daily walk around lens and is on my camera (Canon 50D) most of the time.
When using the above lens I've noticed, when VC turns on and off, that the image in the view finder shifts up and down respectively. Is this a normal behavior for this lens or should I be concerned that the VC is on the way to quiting? It does not seem to have any effect on image quality. Thanks