New Optics With The Largest XA Element.
Three XA (extreme aspherical) elements, including the largest ever made for any α lens, combine with one aspherical element in an innovative optical design that achieves stunning G Master resolution throughout the image area.
Minimal Aberration Enhances Sharpness.
Two Super ED (Extra-low Dispersion) and three ED glass elements suppress chromatic aberration that can degrade resolution in this type of large-aperture lens, ensuring that colour smearing does not occur anywhere in the image area so that maximum sharpness is maintained throughout.
Surprisingly Small & Lightweight.
An innovative optical design with four aspherical elements, including three XA types, plus a mechanical design that features high-performance XD Linear Motors, in a compact 12-24mm constant F2.8 zoom that weighs only 847 grams. This lens is ideal for landscapes, night scenes, and architecture, while providing extra mobility for active sports shooters who want to use ultra-wide angles.
Crisp Images In Difficult Light.
A new Nano AR Coating II that can be evenly applied to large lens elements or highly curved element surfaces has been developed to suppress internal reflections that can cause flare and ghosting for clear, crisp imagery. Despite the lens's wide angle of view, Nano AR Coating II maintains high clarity and contrast throughout the entire image, even in difficult light.
Gorgeous G Master Bokeh.
While the extremely high surface precision of the lens's XA elements effectively suppresses onion-ring bokeh, fine tuning of the its spherical aberration characteristics during both design and manufacture, plus a 9-blade circular aperture, contribute to exquisitely smooth, creamy G Master bokeh.
Constant F2.8 Maximum Aperture For Flexible Moviemaking.
With a constant F2.8 maximum aperture at all focal lengths, aperture does not change while zooming so that exposure, shutter speed, and ISO sensitivity can remain consistent while shooting movies. When used on an APS-C body or with a Super 35 angle of view, the wide end of the zoom range becomes equivalent to 18mm on a full-frame body, providing a very useful zoom range for moviemaking.
Floating Mechanism Achieves Excellent Resolution From Infinity To Close Focus.
A floating focus mechanism that divides the lens's focus group into two independently controllable groups is extremely effective in minimizing aberration that varies with focusing distance. Top performance is maintained from infinity to close-up focus, throughout the entire zoom range. The floating mechanism not only contributes to outstanding close-up performance, but also outstanding sharpness with subjects at any distance.
Fluorine Front Element Coating.
The front lens element features a fluorine coating that repels water, oil, and other contaminants, while making it easier to wipe off any contaminants or fingerprints that do become attached to the lens surface.
Fast, Precise Autofocus & Tracking.
A total of four XD Linear Motors, two for each of the lens's focus groups, contribute to fast, precise autofocus and tracking that augment the many advantages provided by Sony's native lenses. This advanced system makes full use of the speed potential provided by high-performance camera bodies, making it easier to capture significant moments in the most dynamic sports or other types of action. AF operation is also quiet with minimal vibration.
Rear Filter Holder.
Standard sheet-type ND, color correction, and other filters can be inserted into the lens's rear filter holder for expanded expressive capability. A cutting template for sheet filters is supplied.
Integral Lens Hood With Dedicated Lens Cap.
An integral lens hood effectively blocks off-axis light that can cause flare and ghosting. The supplied lens cap covers the hood, attaching easily and locking securely with the hood at any angle.
Customisable Focus Hold Button.
A conveniently placed focus hold button not only offers easy focus hold control, but can be assigned to a variety of other functions from a menu accessed via the camera body.