Pre-IFA 2009: Sony has released a full-frame 28-75mm F2.8 SAM lens to accompany its new Alpha DSLR-A850 digital SLR. The constant F2.8 lens offers a less expensive alternative to the Sony Zeiss 24-70mm F2.8 ZA for A850 and A900 owners looks for a fast standard zoom. Construction is made up of 14 elements in 16 groups, including four aspherical elements. It features the SAM (Smooth Autofocus Motor) in-lens autofocus technology, rather than the SSM system used in the ZA lens. Priced approximately at around $800 USD, it will start shipping from November 2009.

The company has also announced a little more detail about its SAL30M28 30mm F2.8 Macro DT (APS-C format) lens. It will be launched at the same time and has a minimum focusing distance of 0.129m, giving 1:1 reproduction.


Sony 28-75mm F2.8 SAM lens

Sony 28-75mm F2.8 SAM lens specifications

Price US: $800
Maximum format size FX
Focal length 28-75mm
35mm equivalent focal length (on APS-C cameras) 42-112.5mm
Diagonal angle of view 75°- 32 °
Maximum aperture F2.8
Minimum aperture F32
Lens Construction

• 16 elements/ 14 groups
• 4 aspherical
Number of diaphragm blades

7
Minimum focus 0.38m / 1.3ft
Maximum magnification

0.22
Image stabilization

No
Filter thread 67mm
Weight 565 g (20 oz)
Dimensions 77.5mm diameter x 94mm length
(3.2 x 3.8 in)
Lens Mount Sony Alpha/Minolta MA