Sigma 70-300mm F4-5.6 APO DG Macro

Perhaps this lens (as the Tamron equivalent one) is the first-time (and in my case, long time :-) ), cheapest telephoto lens, widely bought in addition to the standard focal-lenght kit lens. This lens, in the APO version I own, shows a quite GOOD optics; the a humble daily just photo viewing test, I really must say I get no cromatic aberrations, lateral coma or other visible distortions. A very good plus is the (not so really) macro function, that permits using this lens for a wide range of ...