Sigma launches stabilized 70-200mm F2.8 telezoom
Feb 20, 2010 at 23:00 GMT
PMA 2010: Sigma has launched into PMA with a veritable salvo of interesting new products. First up is the APO 70-200mm F2.8 EX DG OS HSM, an image-stabilised fast telezoom with ultrasonic-type silent focusing that provides a direct alternative to recent arrivals from Canon and Nikon. The all-new optical design uses two elements made of Sigma's newly-developed 'FLD' glass (plus three of SLD glass) to reduce aberrations, a 9-blade circular aperture for attractive bokeh, and features full-time manual focus override. The Optical Stabilisation system promises up to four stops benefit when hand-holding, and like other recent Sigma lenses, can be used by owners of Sony and Pentax cameras (the lens will also be available in Canon, Nikon and Sigma mounts). Last but not least, a dedicated adapter that extends the length of the hood for APS-C users is supplied as standard.
SIGMA APO 70-200mm F2.8 EX DG OS HSM
February 21, 2010: The Sigma Corporation is pleased to announce the new Sigma APO 70-200 F2.8 EX DG OS HSM.This large aperture telephoto zoom lens incorporates Sigma’s original Optical Stabilizer function.
The lens covers a medium telephoto range of focal lengths from 70mm to 200mm and has a large maximum aperture of F2.8 throughout the entire zoom range. The OS (Optical Stabilizer) function offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible. For Sony and Pentax mount, the built-in OS function of this lens can be used even if the camera body is equipped with an image sensor shift anti-shake system.
As compensation for camera shake is visible in the view finder, the photographer can easily check for accurate focus and ensure there is no subject movement. Two FLD (“F” Low Dispersion) glass elements, which have the performance equal to fluorite glass, and three SLD (Special Low Dispersion) glass elements provide excellent correction of color aberration.
High image quality is assured throughout the entire zoom range and an optimum optical power layout provides superior optical quality in all shooting ranges from close-up to infinity. Super Multi-Layer Coating reduces flare and ghost. This lens incorporates HSM (Hyper Sonic Motor), ensuring a quiet and high speed AF as well as full-time manual focus capability.
The lens has a minimum focusing distance of 140cm (55.1”) throughout the entire zoom range and a maximum magnification ratio of 1:8. The rounded 9 blade diaphragm creates an attractive blur to the out of focus images. This lens is equipped with a Petal-type hood. For digital cameras with an APS-C size image sensor, a dedicated hood adapter, which expands the length of the lens hood, is supplied.
|Lens construction|| 17 groups 22 elements
3 SLD glass elements
2 FLD glass elements
|Angle of view||34.3°-12.3°|
|Closest focus distance||
140cm / 55.1in
|Maximum reproduction ratio||1:8|
|Aperture blades||9 (rounded)|
|Filter attachment size||77 mm|
|AF motor||HSM motor|
|Dimensions||86.4mm x 197.6mm (3.4in x 7.8in)|
|Supplied accessories|| Case
Petal-type Hood (LH850-02)
Tripod socket TS-21
|Optional accessories|| Sigma DG UV 77mm
Sigma DG Circular Polarizer 77mm
APO Teleconverter 1.4x EX DG
APO Teleconverter 2x EX DG
|Mounts||Sigma, Sony, Nikon, Pentax, Canon|