Sigma 180mm f/3.5 EX IF HSM Macro Lens for Canon SLR Cameras
This high-performance tele-macro lens can focus from infinity to full 1:1 life-size reproduction without accessories. At 1:1 reproduction, the distance from subject to film plane is 18.1 , making this lens convenient for photographing subjects that are not easily approached, such as small animals or insects. The apochromatic design and two SLD (Special Low-Dispersion) glass elements, plus the floating inner focus system, effectively control chromatic and spherical aberrations as well as astigmatism, providing superb performance throughout the focusing range. The models for Sigma, Canon and Nikon AF cameras employ Sigma s HSM (Hyper Sonic Motor) for quiet, responsive AF function plus full time manual focus. A Focus Limiter switch aids in faster AF for closer or more distant subject situations, by restiricting the movement of the focusing mechanism. The HSM model lenses can be used with Sigma s 1.4X EX teleconverter as a 252mm f/4.9 lens, with Sigma, Canon and Nikon AF cameras, providing AF function from infinity to about 47 . At closer distances, the lens automatically switches to manual focus. (The models for Minolta and Pentax cameras will be manual focus with the 1.4X EX teleconverter.) This lens can also be used with Sigma s 2X EX teleconverter as a 360mm f/7 lens, for manual focus in all cases. Includes 4 Year Service Plan (1 year international warranty plus 3 years extended warranty). Item Specifications: Product Description: Sigma EX macro lens - 180 mm Weight: 34 oz Length: 7 in Min Focus Range: 18.1 in Lens System: Macro lens Lens Aperture: F/3.5 Focus Adjustment: Automatic, manual Focal Length: 180 mm Mounting Type: Canon EF Lens Construction: 10 group(s) / 13 element(s) Filter Size: 72 mm Special Functions: Macro Sigma's 180mm F3.5 EX IF HSM macro lens lets you take life-size, 1:1 images without the use of accessories. When shooting at this magnification, you can be a full 18.1 inches from your subject, ideal when your subject may be easily disturbed. In addition to the life-size images, this lens also uses the silent HSM (hyper-sonic motor) so you can truly capture those hard-to-get images without disturbing your surroundings or subject. The apochromatic design of the optics, combined with two SLD (special low dispersion) glass elements, plus a floating inner-focus system, help control chromatic and spherical aberrations as well as astigmatism, optical problems that often effect the quality of your images. This effect gives you high-quality performance across the entire focusing range. This model is dedicated to Canon AF SLR cameras. Low Price - Click Now!