The Tamron 70-200mm f/2.8 Di LD (IF) Macro Lens is a lot cheaper at about $700 than its equivalent lenses from Nikon and Canon which could cost anywhere from $1200 to $1650. The review from The-Digital-Picture.com reports a favorable prognosis on this lens, despite a few issues.
Overall, this zoom lens delivers sharp images for its price. The review states, â€œOn the wide end (70mm), this lens is sharp wide open (f/2.8) across the entire 35mm frame. Stopping down only makes a small improvement in sharpness – reduced vignetting is the primary difference seen. By 100mm, the center is still sharp wide open, but corner softness is setting in due to a slightly curved focus plane. Stopping down to f/5.6 results in excellent image quality across the frame.â€
It has a weak spot at 135mm, though, exhibiting a very soft right side at this focal length. But its biggest issue (which could be a non-issue to some!) is its autofocus system.
The review notes its inconsistent AF accuracy, â€œIf you can shoot, check the results and reshoot if necessary (as many times as necessary), this lens can deliver very nice results for a relatively small cost. I would be very uncomfortable if I had to use this lens for a wedding – or adding the slow AF speed factor, for action sports – or for any other important shot that I couldn’t reshoot.â€