Along with the introduction of the A850 DSLR, Sony has introduced the 28-75mm SAM lens. At around $800, the new 28-75mm becomes a more cost effective option over the Sony Zeiss 24-70mm f/2.8 lens. The SAM moniker in the new lens stands for Smooth Autofocus Motor. The 28-75mm lens consists of 14 elements in 16 groups, which includes 4 aspherical elements. Filter thread size is 67mm.
The Sony 28-75mm f/2.8 SAM lens should be available in November 2009 for about $800. Check availability on Amazon.com.