The big issue with this particular lens is soft corners and edge blurring
The Sony DT 18-70mm f/3.5-5.6(D) is a condensed, wide-angle through mid-telephoto AF zoom lens especially created for Sony Alpha and the Minolta D SLR camera bodies. Optics have been computer optimized for an APS-C smaller diameter imager circle to properly function with an APS-C CCD sensor employed on DSLR cameras. When mounted on a DSLR camera, the focal length this lens resembles 27-105mm, Just right for portraits,, snapshots, interiors and is an exceptional all-around travel lens.
The big issue with this particular lens is soft corners and edge blurring at the
18mm end with dull, poor-contrast images at the 70mm end. Although there's a sweet spot is around 50mm at f/8, which does not work very well for indoor photos without using an external flash. Compared with the Tamron which has a bigger aperture with greater sharpness throughout its zoom range, providing a much more suitable lens for indoor and outdoor poor-light photography. Note! Not congruent with 35mm SLR or "full-frame" DSLR cameras.
Aug 29, 2011. Announced Jun 15, 2006
• DT lenses employ a new optical system that is specifically designed for APS-C
• ED (Extra-low Dispersion) glass to reduce telephoto chromatic aberrations, correcting certain wavelengths of light for sharp, clear images with well defined colors.
• Sony SAL-1870 AF DT 18-70mm f/3.5-5.6(D) Autofocus Lens
• Front & Rear Lens Caps
• Lens Hood
• 1-Year Warranty