Very compact and reasonably sharp, this lens has trouble reining in distortion at all focal lengths, especially in the midrange (witness its 2.7% pincushion distortion at 70mm).
Standout Spec: The 1:2.7 maximum magnification ratio gets you quite close.
Lens Test: Tamron 28-300mm f/3.5-6.3 XR Di VC AF
Nikon AF Nikkor 28mm f/2.8D
Tamron AF 28-80mm f/3.5-5.6
Sigma 28mm f/1.8 EX DG Macro
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Tamron 28-300mm f/3.5-6.3 XR LD