|Previous news story Next news story|
CP+ 2011: In a group of releases, Sigma has unveiled an optically stabilized version of its 50-150mm F2.8 fast telephoto zoom for APS-C DSLRS. The 50-150mm f/2.8 EX DG APO OS HSM gives a field-of-view range equivalent to around 75-225mm on a 35mm system, but in a design that is smaller and lighter than full frame 70-200mm F2.8 designs. The latest, 'OS' version is claimed to offer the ability to get stable shots at shutter speeds four stops slower than without it. It features a completely revised optical design with 21 elements in 15 groups.
The Sigma Corporation is pleased to announce the new Sigma 50-150mm F2.8 EX DC APO OS HSM, designed especially for digital SLRs with an APS-C size image sensor.
Sigma’s proprietary OS (Optical Stabiliser) system enables hand held tele-photography by allowing the use of shutter speeds approximately 4 stops slower than would otherwise be possible.
Six SLD glass elements compensate for chromatic aberrations and provide high image quality throughout the zoom range. The Super Multi-Layer Coating reduces flare and ghosting and ensures sharp and high contrast images even at the maximum apertures.
The lens design adopts an inner focusing and inner zooming system to provide convenient handling and the HSM (Hyper Sonic Motor) ensures quiet and high speed autofocus while allowing full-time manual focus override.
This lens has a minimum focusing distance of 80cm (31.5”) and a maximum magnification ratio of 1:6.3. The rounded 9 blade diaphragm creates an attractive blur to the out of focus areas of the image. The addition of Sigma’s TELE CONVERTER 1.4x EX DG APO or 2x EX DG APO produces a 70-210 F4 AF telephoto zoom lens or 100-300 F5.6 AF telephoto zoom respectively.
|Diagonal Angle of view (FF)||27.9-9.5º|
|Lens Construction||• 21 elements / 15 groups
• 6 SLD glass elements
|No. of diaphragm blades||9, rounded|
|AF motor type||Ring-type Ultrasonic|
|Image stabilization||• Yes
• Four stops claimed
|Filter diameter||• 77mm
• Does not rotate on focusing
|Dimensions||86.4mm x 197.6mm (3.4in x 7.8in)|