Everything’s wrapped up in a robust, weather-resistant casing and high-tech Nano AR Coating is applied to minimize ghosting and flare. Optical finery includes an aspherical lens element, an ED (Extra-low Dispersion) element and a Super ED element. This avoids the risk of the front of the lens casting a shadow over the subject in macro photography. Focusing is fully internal, so the physical length of the lens doesn’t extend at short focus distance. There’s also a customizable AF hold button and switches for optical stabilization on/off and autofocus range limiting, with which you can lock out either the short or the long end of the total travel. Switching between auto and manual focusing, the latter often being preferred in macro shooting, you just need to snap the control ring backwards or forwards - a trick often used in Tokina lenses amongst others. Autofocus is driven by a DDSSM (Direct Drive Super Sonic wave Motor) that’s quick, quiet and highly accurate even for extreme close-ups. This Sony macro lens has a pretty impressive feature list.
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