User Manual

sagittal coma flare for outstanding image quality without streaking―even at wide-open
aperture.
● SIGMA’s fifth large-diameter F1.4 lens for full-frame sensors.
Among its new product lines, this is the fifth large-diameter F1.4 lens SIGMA has
introduced for cameras with full-frame sensors. SIGMA is the only lens manufacturer that
covers 20-85mm at F1.4 brightness in its lineup. This latest lens reflects our experience
with this specification and insistence on offering only the best.
● The beautiful bokeh effect that only a large-diameter lens can offer
Elements made of SLD (Special Low Dispersion) glass and an optimized power distribution
help minimize axial chromatic aberration. In the areas in front of and behind the point of
focus, the optical system produces an attractive and natural bokeh effect by producing a
smooth gradation of focus and minimizing streaking.
2. An all-new lens that leverages SIGMA’s latest design technologies.
● Newly designed HSM for nimble AF control
The newly designed Hyper Sonic Motor (HSM) offers 1.3 times the torque of its predecessor.
Even at low speeds, it offers exceptionally stable performance, and the updated AF
algorithm helps ensure nimble autofocus performance. In addition, full-time manual focus
override allows the lens to be switched to manual focus simply by rotating the focus
ring—even during continuous AF. The user can quickly find the perfect focus without
needing to touch the focus mode switch.
3. Other features
● Compatible with Mount Converter MC-11
Mount Converter MC-11 allows you to use your SIGMA SA mount and SIGMA EOS mount
(Canon-compatible) interchangeable lenses with the Sony E-mount camera body. Owners