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Sigma 17-50mm f/2.8 EX DC OS HSM

Sigma 17-50mm f/2.8 EX DC OS HSM
Sigma 17-50mm f/2.8 EX DC OS HSM
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Sigma 17-50mm f/2.8 EX DC OS HSM
Sigma 17-50mm f/2.8 EX DC OS HSM
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Overview

Description by Sigma:

  • For use with smaller chip APS-c digital cameras only
  • Offers Sigma’s OS System (Optical Stabilization) allowing handheld photography even in low-light situation
  • HSM (Hyper-Sonic Motor) ensures a quiet & high-speed auto focus
  • FLD glass elements with performance equal to fluorite glass for compensate for color aberration
  • Ultra compact with overall length of just 3.6”
  • A lens hood, front & rear lens cap and carrying case are included with the lens.

Sigma’s new 17-50mm F2.8 EX DC OS HSM large-aperture standard zoom lens covers a focal length from 17mm wide angle and offers a large aperture of F2.8 throughout the entire zoom range, making it ideal for many types of photography especially portraiture and landscapes. The OS, Sigma’s anti shake feature offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible. The OS feature allows Sony and Pentax users the option of viewing a stabilized image in the viewfinder, a feature offered only by Sigma. HSM provides fast and quiet AF. Sigma’s own FLD glass elements, which have performance equal to fluorite along with two glass mold and one hybrid aspherical lens, provide excellent correction for all types of aberrations. The Super Multi-Layer coating reduces flare and ghosting. This lens boasts superior peripheral brightness and provides sharp, high contrast images even at the maximum apertures. With a minimum focusing distance of 11 inches throughout the entire zoom range and a magnification ratio of 1:5. When you need to stand ready for any photo opportunity you need a fast aperture so you can shoot in low existing light or at maximum range with a flash. This Sigma lens is perfect. With its compact size and light weight, it’s a necessary addition to your camera bag

*Vignetting will occur if the lens is used with digital cameras with image sensors
  larger than APS-C size or 35mm SLR cameras.
* For Pentax mount, if the camera body does not support HSM, auto focus will not be available.
* OS function is not available for Sony and Pentax mounts.

Reviews

"For many, their first general purpose lens is the one available in-the-box with their first DSLR. While the kit lens is very economical, it is also the source of many emails I receive - especially when being used indoors without a flash. If there is any subject movement, the max aperture available on these lenses is not wide enough to allow the action to be stopped - resulting in motion-blurred images.

Post date: 07/08/2011 - 00:00

"At only 92mm long, this lens is very compact for one with an f/2.8 constant maximum aperture. It's quite lightweight too, weighing only 595g. Still the build quality is reassuringly sturdy. Although it may not be up to the standard of the top marque lenses, the plastics used in the construction feel strong enough to withstand reasonably heavy use. Mechanically the lens is well put together too, with no creaks or wobbles

Post date: 06/08/2011 - 00:00

Specifications

Specifications
Lens type: 
Zoom
Lens Mount: 
Nikon F mount
Canon EFS mount
Pentax Kaf Mount
Sony A mount
Sigma SA mount
AF Motor type: 
HSM - Hyper-Sonic Motor
Optical characteristics
Focal Length: 
17 - 50mm
Internal zooming: 
No
Angle of view: 
72.4° - 27.9°
Zoom Ratio: 
3.0x
Max Magnification: 
0.2x
Lens construction: 
17 Elements in 13 Groups
Diaphragm Blades: 
7 aperture blades
Maximum Aperture: 
f/2.8
Minimum Aperture: 
f/22.0
Aperture ring: 
No
Internal Focusing: 
Yes
Front lens element rotating: 
No
Minimum Focusing Distance: 
28.00cm
Distance Scale: 
Yes
Full-Time manual focus: 
Yes
Auto Focus / Manual Focus switch: 
Yes
Stabilization system : 
Yes
Stabilization system details: 
Optical Image Stabilizer for Canon, Nikon and Sigma mounts
Physical characteristics
Diameter: 
83.0mm
Length: 
91.0mm
Weight: 
565.0 g
Body material: 
Plastic with metal mount
Weather sealing: 
No
Filter Diameter: 
77 mm
Lens Hood included: 
Yes

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A notice Our vast database is currently being re-constructed. Estimated finishing date is sometime in June/July 2012. Bookmark us and check back again for the grand opening of the ultimate Lens database. The Estiasis.com team

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