• Sigma 17-70mm F2.8-4 DC Macro OS HSM Lens
• Front & Rear Lens Cap
• Lens Hood
• 1-Year Warranty
Sigma 17-70 2.8-4 OS HSM, January 9, 2010
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.
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.