The Sony FE 100-400mm F4.5 GM OSS is the newest addition to Sony’s flagship G Master lens series for full-frame Alpha E-mount cameras.

The lens delivers the exceptional resolution and bokeh that define the G Master series, covering a 100-400 mm focal range with a constant F4.5 aperture with high-precision autofocus (AF).

It is up to approximately 3x faster than the FE 100-400mm F4.5-5.6 GM OSS and weighs approximately 1,840 g with an internal zoom structure. Its stable weight balance offers highly mobile shooting capabilities. The FE 100-400mm F4.5 GM OSS gives wildlife, birding, sports, and photojournalism creators the speed, reach, and image quality to capture decisive moments in any environment, expanding their creative possibilities.

Premium G Master Optics Deliver High Resolution and Bokeh

  • Resolves fine detail across the full 100-400 mm zoom range, even wide open at F4.5
  • Optical design featuring newly developed ED XA (Extra-low Dispersion extreme aspherical), XA (extreme aspherical), two Super ED (extra-low Dispersion), and three ED glass elements, effectively controlling multiple aberrations including chromatic and spherical aberration to achieve exceptional resolution from centre to edge across the entire zoom range
  • Nano AR Coating II reduces ghosting and flare for high-contrast results in backlit conditions
  • 11-blade circular aperture with precision spherical aberration control produces the signature G Master bokeh
  • Constant F4.5 maximum aperture eliminates exposure shifts while zooming
  • Compatible with optional teleconverters3 for focal lengths up to 800 mm or 1,200 mm in APS-C mode4

Faster Autofocus Designed for Wildlife and Sports Photography

  • Four custom-optimised XD (extreme dynamic) Linear Motors, a floating focus mechanism, and the latest AF algorithms deliver AF speeds up to 3x faster with approximately 50 % improved subject tracking
  • Fully compatible with Alpha 9 III continuous shooting at up to 120 fps5 with AF/AE tracking
  • Lightweight Internal Zoom Design Improves Mobility
  • Combining the latest optical design, mechanical engineering with lightweight yet robust magnesium alloy barrel components, and high-efficiency, high-thrust XD Linear Motors, the lens achieves a lightweight and robust body at approximately 1,840 g
  • Inner-zoom design maintains constant length and stable centre of gravity throughout the zoom range for precise framing adjustments without shifting balance

Professional Features Enhance Reliability in Challenging Conditions

  • Built-in stabilisation supports Active Mode and coordinates internal stabilisation control on compatible bodies
  • Supports the camera body’s breathing compensation6, correcting angle-of-view shifts during focus adjustments in video recording
  • Four focus hold buttons and a dedicated function ring for intuitive, personalised operation in the field
  • Dust and moisture resistant design8 with fluorine front-element coating maintains reliable performance in challenging conditions

Australian Availability and Pricing

The FE 100-400mm F4.5 GM OSS will be available in Australia from late May 2026 with SRP A$7,399.00.