Sigma 50-200mm ƒ/4-5.6 DC OS HSM is an update to the company’s previous telephoto zoom lens. The original 50-200mm was once upgraded to incorporate an in-lens motor, and then in 2009 again to provide optical stabilization.

The lens was designed specifically to fit the APS-C sensor, and it is incompatible with film or full-frame digital camera bodies. On a Canon body the lens offers 80-320mm range (1.6x crop-factor); on Nikon and others - 75-300mm range (1.5x crop).

The 50-200mm incorporates of HSM (Hyper Sonic Motor) for quiet and high-speed auto focus.

Handheld shooting is also improved. The lens’s OS (Optical Stabilizer) function eliminates the effects of camera shake allowing the use of shutter speeds 4 stops slower than normal for. It operates in conjunction with or an alternative to the cameras’ built-in OS System anti-shake function (if any).

The 50-200mm incorporates SLD (Special Low Dispersion) glass in the front lens group and is equipped with an inner focusing system that eliminates front lens rotation, making it suitable for use with circular polarizing filters. Super Multi-Layer Coating, in its turn, reduces flare and ghosting as well as provides high contrast images.

The lens ships with a circular-shaped lens hood, takes 55mm filters, and is available now for approximately $300.

Alternatives/Rivals: Pentax 50-200mm f/4-5.6 ED SMC P-DA, Tamron 55-200mm f/4-5.6 Di II LD Macro AF, Canon EF 55-200mm f/4.5-5.6 II USM, Nikon 55-200mm f/4-5.6G IF-ED AF-S DX VR Nikkor, Sony 55-200mm f/4-5.6 DT .

Slrgear.com:
With internal focusing and optical stabilization, there’s a lot to like about the new lens, especially considering the low price tag. It provides good performance when stopped down to ƒ/5.6 or ƒ/8 and.

Sigma 50-200mm ƒ/4-5.6 DC OS HSM – Specifications:

• Image Circle: APS-C
• Focal Length: 50-200mm
• Focal Length APS Equivalent:
  • 1.5x: 75-300mm
  • 1.6x: 80-320mm
• Maximum Aperture: ƒ/4 - 5.6
• Minimum Aperture: ƒ/22
• 8 Diaphragm Blades
• Lens Construction: 14 elements in 10 groups, with 1 SLD element
• Diagonal Angle of View (Based on image circle): 27.9 to 7.1 degrees
• Optical Stabilization
• Internal Focusing
• HSM with Full-Time Manual Override
• No Front Element Rotation
• Rotary Zoom System
• Closest Focus: 110cm / 43.3 in.
• Magnification Ratio: 0.22x / 1:4.5
• Filter Size: 55mm
• Available AF Mounts: Sigma, Canon, Nikon, Sony, Pentax.
• Typical Online Price: US$300

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This entry was posted on Thursday, October 29th, 2009 at 1:28 pm and is filed under Lenses, Sigma Lenses. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.