Sigma 17-70mm f/2.8-4 DC Macro OS HSM Lens

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Ideal for Many Situations Such as Portraits, Sports, Macro and General Photography

Sigma 17-70mm f/2.8-4 DC Macro OS HSM Profile ViewDigital Camera LensThe Sigma Corporation is pleased to announce the new Sigma 17-70mm F2.8-4 DC MACRO OS HSM. This large aperture standard zoom lens offers an aperture of F2.8 at the 17mm focal length and is ideal for many situations such as portraits, sports, macro and general photography.

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 anti-shake function. As the 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.

The maximum aperture of F2.8 produces an attractive background blur and improves autofocus speed.This lens has a minimum focusing distance of 22cm(8.7in.) throughout the entire zoom range and maximum magnification ratio of 1:2.7, making it ideal for close-up photography. It is possible to focus as close as approximately 4.7cm(1.9in.) from the tip of the lens to the subject making this lens particularly useful for close-up photography.

Three aspherical lenses and one ELD (Extraordinary Low Dispersion) glass element provide excellent correction for all types of aberrations. High image quality is assured throughout the entire zoom range. The Super Multi-Layer Coating reduces flare and ghosting and provides high contrast images. The incorporation of HSM (Hyper Sonic Motor) ensures a quiet and high speed AF.

This lens has a rounded 7 blade diaphragm which creates an attractive blur to the out of focus areas of the image. The inner focusing system eliminates front lens rotation, making the lens particularly suitable for using the supplied petal-type lens hood and circular polarizing filters.

HSM means this lens will autofocus on Nikon D40/D40x, Nikon D60, Nikon D3000, Nikon D3100 and the Nikon D5000

Features

Large aperture standard zoom lens designed exclusively for digital SLR cameras and incorporating Sigma’s original OS (Optical Stabilizer) function with close up capability

This standard zoom lens is designed exclusively for digital SLR cameras and incorporates Sigma`s original OS (Optical Stabilizer) function. This lens covers several angles of view, from wide to telephoto as well as offering a large aperture of F2.8 at the 17mm focal length. It provides a bright image through the viewfinder and enables photographers to easily check focusing and composition. The lens has a minimum focusing distance of 22cm (8.7 inches) and a maximum magnification ratio of 1:2.7 making it ideal for close-up photography as well as landscape and macro photography. ELD (Extraordinary Low Dispersion) glass and aspherical lenses provide excellent correction for all types of aberrations and high image quality is assured throughout the entire zoom range. Super Multi-Layer Coating reduces flare and ghosting. The incorporation of HSM (Hyper Sonic Motor) ensures quiet and high speed AF.

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Specifications
Overview
Lens styleZoom lens
Max Format Size APS-C / DX  
Lens focal length17 – 70 mm  
Stabilization type Yes (4 stops claimed)  
Camera mount Canon EF, Pentax KAF3, Sony Alpha, Sigma SA, Nikon F (DX)  
Angle of view 72.4 - 20.2 degrees  
Aperture (lens diaphragm)
Largest aperture opening F2.8 - F4.0  
Smallest aperture opening F22.0 - F32.0  
Includes aperture ring No  
Total diaphragm blades 7  
Aperture annotations rounded diaphragm  
Optical
Total Elements 17  
Number of Groups 13  
Coatings / special elements 1 ELD glass element 1 hybrid aspherical element 2 glass mold elements  
Focusing
Minimum focus distance 0.22 m (8.66")  
Maximum magnification ratio 0.37 x  
Autofocus type Yes  
Full time manual focus No  
Focusing method Internal  
Focus notes AF will not function with Pentax ist* series and K100D DSLR cameras that do not support HSM  
Lens distance scale Yes  
Depth of field scale No  
Focus distance limiter No  
Physical features
Overall weight520 g (1.15 lb)  
Lens diameter 79 mm (3.11")  
Overall length 89 mm (3.50")  
Construction materials Metal mount  
Sealing No  
Zooming method Rotary (extending)  
Filter thread size 72 mm  
Filter annotations Does not rotate on focusing  
Lens hood included Yes  
Tripod collar included No


Item Includes

• Sigma 17-70mm F2.8-4 DC Macro OS HSM Lens
• Front & Rear Lens Cap
• Lens Hood
• 1-Year Warranty

Accessories

Reviews
Sigma 17-70 2.8-4 OS HSM, January 9, 2010 v By Edward Truman "Media Man" (Raleigh, North Carolina USA)

This review is from: Sigma 17-70mm f/2.8-4 DC Macro OS HSM Lens for Canon Mount Digital SLR Cameras (Electronics)

I received the Sigma 17-70 2.8-4 OS HSM from ebay five days ago. I have taken about 400 shots with this lens, including landscapes, indoor family gatherings with flash, and a sporting event in a large, well-lit indoor arena. It seems to me that this lens works as advertised. I don't see focus problems with this lens in either the AI Servo to AI Focus modes on my Canon XSi. The XSi exposure metering seems to work fine with the Sigma 17-70, and I cannot see anything wrong with color accuracy. The finish, appearance, and feel of the lens are pleasing. I like it, and it certainly seems to be a good value given its relatively low cost vs. function. I have awarded four stars in my rating only because of my limited experience with this lens. If this lens continues to work as it has so far, I would award a fifth star.

Photography is my hobby, not my profession, but I carry my camera to work and shoot nearly every day. I cannot afford high-end camera equipment, so I make do with what I can afford. Even so, I have had rewarding successes and lots of fun with my hobby. My photos have been published in magazines, textbooks, brochures, large-format calendars, and web sites. They have been framed and hung on walls in office suites, sports arenas, and homes.

I have used Sigma lens for the past ten years, and currently own four Sigma lens for my Canon XSi. Sigma lens are cheap, they are most often lightweight as compared to Canon lens, and they work acceptably well. I am familiar with the "you get what you pay for" concept, and I understand that sometimes there are issues with Sigma lens. I can see why professionals need sturdy equipment, but overall Sigma has provided me with a successful and cost-effective way to observe, record, and enjoy my surroundings.

Press Release
Friday, 4 December 2009
17-70mm F2.8-4 DC MACRO OS HSM

Large aperture standard zoom lens designed for digital SLR cameras

    Minimum focusing distance of 22cm at all focal lengths
    Integrated Optical stabilization system
    Aspherical and ELD glass elements
    Large aperture of F2.8 at the wide angle setting
    Hyper Sonic Motor (HSM) ensuring silent, high-speed AF*
The Sigma Corporation is pleased to announce the new Sigma 17-70mm F2.8-4 DC MACRO OS HSM.

This large aperture standard zoom lens offers an aperture of F2.8 at the 17mm focal length and is ideal for many situations such as portraits, sports, macro and general photography. The OS (Optical Stabiliser) 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 anti-shake function. As the 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. The maximum aperture of F2.8 produces an attractive background blur and improves autofocus speed.

This lens has a minimum focusing distance of 22cm (8.6 inches) throughout the entire zoom range and maximum magnification ratio of 1:2.7, making it ideal for close-up photography. It is possible to focus as close as approximately 4.7cm from the tip of the lens to the subject making this lens particularly useful for close-up photography.

Three aspherical lenses and one ELD (Extraordinary Low Dispersion) glass element provide excellent correction for all types of aberrations. High image quality is assured throughout the entire zoom range. The Super Multi-Layer Coating reduces flare and ghosting and provides high contrast images. The incorporation of HSM (Hyper Sonic Motor) ensures a quiet and high speed AF. This lens has a rounded 7 blade diaphragm which creates an attractive blur to the out of focus areas of the image. The inner focusing system eliminates front lens rotation, making the lens particularly suitable for using the supplied petal-type lens hood and circular polarising filters.

*Autofocus on Pentax version only available on K10D and newer bodies offering HSM/SDM support.


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Sigma 17-70mm f2.8-4 DC Macro OS HSM Lens

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