Sigma announce APO 50-150 mm F2.8 DC lens
Published Aug 11, 2006
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dpreview staff
Sigma has today announced a very interesting sounding lens, the new APO 50-150 mm F2.8 EX DC HSM. This lens promises to be compact (its DC notation means its designed for an APS-C size imaging circle) and fast (an F2.8 maximum aperture) with a good telephoto zoom range, HSM focusing motor and four SLD (Low Dispersion) glass elements to reduce chromatic aberrations. This lens on a 1.5x crop digital SLR (such as the Nikon D80) would provide an equivalent FOV of 75 to 225 mm.
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Press Release:
APO 50-150mm F2.8 EX DC HSM
Compact, lightweight, large aperture telephoto zoom lens designed exclusively for digital SLR cameras and incorporating the very latest optical technology.
- Compact and lightweight
- Incorporation of the very latest optical technology, high image quality is assured throughout the entire zoom range.
- Four SLD（Special Low Dispersion）glass elements are used for utmost correction of chromatic aberrations.
- Equipped with HSM (Hyper Sonic Motor) with full-time manual focus override.
- Compatible with Sigma 1.4x EX DG and 2x EX DG APO Tele-Converters
The Sigma Corporation is pleased to announce the launch of the new APO 50-150mm F2.8 EX DC HSM lens.
Specially designed for digital SLR cameras with an APS-C size image sensor, this large aperture F2.8 lens has a compact and lightweight construction of 76.3mm (3.0”) in diameter, 132.6mm (5.2”) in length and weighing just 780g (27.5oz) (Nikon Mount).
The incorporation of the very latest optical technology gives optimum lens performance providing excellent correction for flare, ghosting and all types of aberrations. High image quality is assured throughout the entire zoom range. Four SLD（Special Low Dispersion）glass elements are used for utmost correction of chromatic aberrations.
The HSM (Hyper Sonic Motor) system ensures quiet and high-speed auto focusing with full time manual focus override.
The addition of the 1.4x EX DG APO or 2x EX DG APO Tele Converters (optional extras) produces a 70-210mm F4 AF tele-zoom lens and a 100-300mm F5.6 AF ultra-telephoto zoom lens respectively.
APO 50-150mm F2.8 EX DC HSM specifications
| Focal length |
50 - 150 mm |
| Maximum aperture |
F2.8 (throughout the zoom range) |
| Minimum aperture |
F22 |
| Lens constructions |
18 Elements in 14 groups |
| Angle of view |
27.9° - 9.5° |
| Number of diaphragm blades |
9 pieces |
| Minimum focusing distance |
1 m (3.3 ft) |
| Maximum magnification |
1:5.3 |
| Filter size |
67 mm |
| Lens hood |
Bayonet type |
| Dimensions |
76 mm x 135 mm (3.0 x 5.3 in) |
| Weight |
770 g (1.7 lb) |
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