From the Photokina floor: Sony Pro-Caliber Zeiss and Sony G FE Lenses
Sony didn't announce any new cameras at the photokina show, but the company did unveil two exciting new lenses for its pro-directed, full-frame E-mount mirrorless cameras, namely, the Sony a7, a7R, and a7S. The beautifully made FE PZ 28-135mm f/4 G OSS zoom is a member of Sony’s elite G series and it’s clearly targeted at 4K video shooters, as well as professional still photographers, due to its power zoom control, quiet SSM motor that handles a lightweight focusing group, and the first-time use of linear AF motor. The 18-element, 12-group lens features a 9-circular-bladed diaphragm for smooth transitions and enhanced bokeh, built-in Optical SteadyShot (OSS) image stabilization, dust- and moisture-resistant construction, and is claimed to hold focus extremely well when zooming. Additionally, the lens construction also incorporates ED glass and aspherical elements for enhanced color correction and image quality. Despite is fairly large size of 4 x 6.5 inches and solid construction, the 28-135mm weighs a reasonably light 2.7 pounds—not bad, considering its constant aperture of f/4.
The Vario-Tessar T* FE 16-35mm f/4 ZA OSS is a wide-angle zoom, also featuring a silent AF and aperture-setting system to suit pro video applications. It, too, incorporates Sony’s OSS image stabilization system to minimize camera shake, and utilizes extra-low dispersion glass and five aspherical elements to reduce chromatic aberrations and distortions. A proprietary Zeiss T* anti-reflective coating minimizes flare and ghosting, while a seven-blade diaphragm contributes to pleasing bokeh. Only the middle optical groups are used for internal focusing, so the overall length of the lens doesn't change and the front does not rotate as you focus—a great convenience when using polarizing filters. Considering its range and constant aperture, the 12-element, 10-group 16-35mm is quite compact at 3.1 x 3.9 inches, and it weighs only 1.1 pounds.