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Sony Unveils FE 100-400mm f4.5 GM OSS G Master Zoom
13 May 2026
Sony has introduced the FE 100-400mm f4.5 GM OSS, the newest addition to its flagship G Master lens series for full-frame Alpha E-mount cameras. Covering a 100-400mm focal range with a constant f4.5 aperture, it features high-precision autofocus up to approximately 3x faster1 than the FE 100-400mm f4.5-5.6 GM OSS. It weighs 65 oz. with an internal zoom structure.
"Our creators want super-telephoto reach with G Master optical quality in a body light enough to shoot handheld all day. The FE 100-400mm f4.5 GM OSS delivers constant f4.5 aperture, dramatically faster autofocus and a build that keeps up with the user's instincts, whether tracking a bird in flight or working the sideline at a championship match," said Yang Cheng, Sony vice president of Imaging Solutions.
HIGHLIGHTS
Highlights of the FE 100-400mm include:
- Full-frame format
- Constant f4.5 max aperture
- Four XD linear AF motors
- Floating focus
- Internal zoom and internal focus design
- OSS with panning and moving subject modes
- Super ED, ED XA and XA glass elements
- Nano AR Coating II and Fluorine coating
- Aperture de-click and lock switches
- Dust and moisture-resistant construction
- Rounded 11-blade diaphragm
SPECIFICATIONS
Specifications for the new zoom include:
SONY FE 100-400mm f4.5 GM OSS GM LENS SPECIFICATIONS Mount Sony E Focal Length 100mm to 400mm Aperture Maximum: f4.5 Angle of View 24° to 6°10' Minimum Focus Wide Angle: 2.1 feet
Telephoto: 4.9 feetMagnification 1:4 macro reproduction ratio
0.25 magnificationOptical Design 28 elements in 20 groups Autofocus Yes Image Stabilization Yes Filter Thread Front: 95mm
Drop-In: 40.5mmDimensions <4.7 x 12.9 inches/td> Weight 4.0 lbs. PRICE, AVAILABILITY
Sony said the FE 100-400mm f4.5 GM OSS will be available in June for $4,299.99. Adorama and B&H are both now accepting pre-orders.
Sony Electronics Unveils the FE 100-400mm f4.5 GM OSS G Master
Super-telephoto zoom with constant f4.5 aperture, autofocus up to 3x faster and outstanding mobility
SAN DIEGO, Calif. -- Sony Electronics Inc. has introduced the FE 100-400mm f4.5 GM OSS, the newest addition to its flagship G Master lens series for full-frame Alpha E-mount cameras. Covering a 100-400mm focal range with a constant f4.5 aperture, the lens delivers the exceptional resolution and bokeh that define the G Master series, high-precision autofocus up to approximately 3x faster than the FE 100-400mm f4.5-5.6 GM OSS. Weighing approximately 65 oz. (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.
"Our creators want super-telephoto reach with G Master optical quality in a body light enough to shoot handheld all day. The FE 100-400mm f4.5 GM OSS delivers constant f4.5 aperture, dramatically faster autofocus and a build that keeps up with the user's instincts, whether tracking a bird in flight or working the sideline at a championship match," said Yang Cheng, Sony vice president of Imaging Solutions.
Uncompromising G Master Optics
- Resolves fine detail across the full 100-400mm 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 center 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 800mm or 1,200mm in APS-C mode4
Autofocus That Keeps Pace with the Action
- Four custom-optimized XD (extreme dynamic) Linear Motors, a floating focus mechanism and the latest AF algorithms deliver AF speeds up to 3x faster1,2 with approximately 50 percent improved subject tracking2
- Fully compatible with Alpha 9 III continuous shooting at up to 120 fps5 with AF/AE tracking
Lightweight Build, Exceptional 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 65 oz. (1,840 g)
- Inner-zoom design maintains constant length and stable center of gravity throughout the zoom range for precise framing adjustments without shifting balance
Professional-Grade Control and Reliability
- Built-in stabilization supports Active Mode and coordinates internal stabilization 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 buttons7 and a dedicated function ring for intuitive, personalized operation in the field
- Dust and moisture resistant design8 with fluorine front-element coating maintains reliable performance in challenging conditions
Pricing and Availability
The FE 100-400mm f4.5 GM OSS will be available in June for approximately $4,299.99 and $5,599.99 CAD. It will be sold directly through Sony and various Sony authorized dealers throughout North America.