PMA 2006: The Sigma 50-500mm F4-6.3 EX DG/HSM lens for Four Thirds is announced at PMA today.

Sigma UK Press Release

The Sigma Corporation is pleased to announce the new 50-500mm F4-6.3 EX DG HSM for the Four Thirds fitting. This high zoom ratio lens is optimised for digital SLR cameras and capable of covering a wide range of focal lengths from 50mm standard to 500mm ultra telephoto. When used on a Four Thirds camera, the effective focal length will be 100-1000mm. This ultra-zoom lens employs a seven-group zoom system, which provides a high zoom magnification of 10x. Triple-cam Rear Focusing System ensures high precision throughout the whole focus range. The new lens coating reduces flare and ghosting, is a common problem of digital cameras, and also creates an optimum colour balance. This lens uses four pieces of SLD (the special low dispersion) glass for excellent correction of color aberration.

- Most effective coating for minimizing flare and ghost with digital SLR cameras.
- Triple-cam Rear Focusing System ensures high precision throughout the whole focus range.
- Uses four SLD (the special low dispersion) glass elements for superior optical performance.
- Accepts both 1.4X and 2X APO EX Tele-Converters, the lens can be used as a 1000mm ultra-telephoto zoom lens.

A zoom lock switch eliminates ‘zoom creep’ during transportation, a convenient addition when traveling.

The rear focus mechanism produces a non-rotating front lens element which accepts a bayonet petal shaped hood, included, which prevents extraneous light from degrading the image quality.

THE SPECIFICATIONS
Focal Length (4/3 Format) 100-1,000mm
Minimum Aperture F22
Lens Construction 20 Elements in 16 Groups
Angle of View (4/3 Format) 23.4°- 2.5°
Number of Diaphragm Blades 9pcs
Minimum Focusing Distance 100cm –300cm(39.3”-118.1”)
Maximum Magnification 1:5.2
Filter Size 86mm
Lens Hood Petal Hood
Dimensions Diameter 95mm (3.7”) x Length 218.5mm (8.6”)
Weight 1842gr/64.9oz
SRP                 £899.99

The appearance and specifications are subject to change without notice.