Tamron SP AF 24-135mm F3.5-5.6 AD Aspherical IF Macro A-mount lens review by jakejones
|jakejones#6941 date: Feb-21-2010|
flare control: 4
|ownership:||I own this lens|
|compared to:||Small Beercan|
Minolta 85mm 1.4 G
Minolta 50mm 1.7
Tamron 20mm 1.8
Sigma 90mm 2.8 macro
Tamron 24-105 f/2.8
Sigma 70-200 f/2.8
Sigma 28-70 f/2.8
|price paid:||299 USD (new)|
Vignette at 24mm
|comment:||This is a great walk-around/vacation lens. The zoom range is quite usable, and the image quality is much better than expected. The lens is on the heavy size, but reasonable, given its zoom range and build quality. The Minolta 24-105 had failed to impress me, and I had been using the small beercan as my walk-around lens for some time. This lens has taken over that spot (I do miss the "macro" feature of the small beercan, but for casual shooting, this lens's range is more useful.)|
On FF, at 24mm this lens does vignette quite a bit, especially wide open. The vignetting at 24mm does get much better by f/7.1, but never completely goes away. At 35mm and longer, there is very little vignette even wide open.
There is some barrel distortion at the wider end, but on a lens with this much zoom, some distortion is to be expected, and this lens does control the distortion very well. There is some CA in the corners, especially when wide open, but again, well controlled, and much better than I've seen in many lenses...an amount easily corrected in post processing.
Where this lens really shines is the IQ. No, its not a CZ prime lens, but for a zoom of this range, I was quite surprised by the IQ, much sharper than you would think at all the zoom lengths.
Focus speed is also good, taking a little over a second to zoom from closest to infinity and back. And, as noted by the reviewer before me, the front element does not rotate.
Edit: I should note, I'm using this lens on an a900, and have adjusted the Micro Focus, the lens back-focuses quite a bit (more than any other lens I own). Once corrected, the lens is very sharp, but on a camera body that does not have micro-focus-adjust, this lens would probably be unusable.