Sony announces 28-75mm F2.8 SAM lens

by **maxgoh** Sat Aug 29, 2009 12:43 am

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 0.129mm, giving 1:1 reproduction.

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