This large aperture telephoto macro lens incorporates Sigma's original Optical Stabilizer function. SLD glass elements provide excellent correction of all types of aberrations. Super Multi-Layer Coating reduces flare and ghosting and a floating inner focusing system provides high optical performance from infinity to 1:1 macro. The HSM (Hyper Sonic Motor) ensures quiet and high speed autofocus as well as full-time manual focusing capability. Attaching Sigma's optional Tele Converters enables photographers to shoot large than 1:1 magnification.
Large aperture medium telephoto macro lens
This medium telephoto macro lens allows you to maintain an appropriate distance from subjects while still getting close up photos. Since the working distance at its closest focusing position is 142mm, shadows of the lens and camera will not affect photography making it suitable for taking photos of subjects, such as flowers, under natural lighting conditions. In comparison to the Sigma 50mm and 70mm macro lenses, the main subjects can be defined with perfectly smooth and blurred backgrounds.
Floating inner focusing
This lens incorporates floating inner focusing which moves two lens groups separately. This minimizes aberrations which occur as shooting distance changes, and enables stable rendering of the image from infinity to 1:1 magnification. This also corrects image distortion, especially when taking close-up pictures. Since focusing does not change its overall length, this lens is easy to hold and use.
High rendering performance
The lens power layout produces excellent optical performance. High refractive index SLD (Special Low Dispersion) glass corrects chromatic aberration, spherical aberration and field curvature. It ensures high rendering performance at all shooting distances. The Super Multi-Layer Coating reduces flare and ghosting, maintaining quality images with high contrast.
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