Sony is refreshing two of its A-mount full-frame lenses. The Zeiss Vario-Sonnar T* 16-35mm F2.8 SSM II wide-angle zoom and 24-70mm F2.8 SSM II standard zoom are replacements for existing lenses (the new models are designated as Mark II). Both lenses’ availability is scheduled for June 2015.
With the exception of focal length and pricing, both lenses have the same improvements and features. They have a constant f/2.8 aperture throughout the focal range, giving you brighter images even at full telephoto. There’s an improved lens coating that further reduces ghosting and flaring. Better sealing at the front and rear of the lens, plus a non-woven cloth in the middle, make the lenses dust and moisture resistant.
As for performance, Sony says they are four-times better than their predecessors, with improved subject tracking and a smooth, quiet autofocusing motor. Aspherical and extra-low dispersion (ED) glass elements are used to control aberration and distorition.
The 24-70mm lens will list for $2,100, and the 16-35mm will list for $2,250. The lenses are compatible with A-mount full-frame and APS-C, and E-mount cameras, such as the A7-series, with an optional adapter.