<ul><li>Dedicated to Pentax AF SLR cameras</li><li>Takes life-size, 1:1 images, without the use of accessories</li><li>Uses the silent HSM (Hyper Sonic Motor)</li><li>Apochromatic design, 2 SLD (Special Low Dispersion) glass elements, floating inner-focus system</li><li>Chromatic, spherical aberrations, and astigmatism virtually eliminated</li></ul> Amazon.com 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, like birds, insects, and animals. 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 and a floating inner-focus system, helps control chromatic and spherical aberrations as well as astigmatism, optical problems that often affect the quality of your images. This effect gives you high-quality performance across the entire focusing range. This model is dedicated to Pentax AF SLR cameras.

Sigma 180mm f/3.5 EX IF HSM Macro Lens for Pentax SLR Cameras