Sony's cinema power zoom for FE — constant f/4 from 28-135mm with smooth servo control.
The Sony FE PZ 28-135mm f/4 G OSS was released approximately 2014 as a power zoom cine lens for Sony FE-mount full-frame, designed for cinema rigs with motorised zoom control. Eighteen elements in 12 groups. Nine rounded aperture blades. 95mm filter thread. At 1,220g. 0.40-0.95m MFD (wide to tele). OSS. f/4 constant aperture.
Eighteen elements in 12 groups. Nine rounded aperture blades. The 95mm filter thread. At 1,220g. Minimum focus distance 0.40m at 28mm, 0.95m at 135mm. Power zoom (motorised, variable speed). OSS optical stabilisation. Zoom hold button. f/4 constant aperture. Full-frame coverage. Sony FE mount.
The power zoom (PZ) is the defining feature: the motorised zoom allows speed-controlled zoom pulls via camera body control or external zoom controller — essential for narrative cinematography where manual zoom speed consistency is required. The G-series build provides optical quality suited to cinema production. The 95mm constant barrel diameter enables Matte Box and follow-focus rig mounting without barrel breathing.
On the used market the Sony FE PZ 28-135mm f/4 G OSS is available at cinema zoom pricing. Condition checks: power zoom motor smoothness, OSS engagement, AF response, 95mm front element for marks. Compatible with Sony FE-mount full-frame and APS-C cinema rigs.