Sony FE 400mm F4.5 GM OSS Full-Frame Super-Telephoto Lens

The Sony FE 400mm F4.5 GM OSS combines flagship G Master image quality, fast professional autofocus, and effective optical stabilization in an exceptionally lightweight super-telephoto prime. At just 994g without the tripod foot, it delivers serious 400mm reach in a lens designed for comfortable handheld shooting and outstanding mobility.

Its advanced optics provide exceptional detail, contrast, and subject separation, while dual XD Linear Motors maintain fast, precise tracking of wildlife, sports, aircraft, motorsports, and other fast-moving subjects. Compatibility with Sony’s 1.4x and 2x teleconverters extends its reach to 560mm or 800mm when even greater magnification is needed.

⚡ Key Benefits

• Professional 400mm full-frame super-telephoto prime

• Bright f/4.5 maximum aperture

• Exceptionally lightweight 994g design

• Compact 242mm overall length

• Outstanding G Master sharpness and contrast

• Beautiful subject separation and smooth bokeh

• Dual XD Linear Motors for rapid autofocus

• Supports continuous AF tracking at up to 120 fps with compatible cameras

• Optical SteadyShot image stabilization

• Three selectable stabilization modes

• Compatible with Sony 1.4x and 2x teleconverters

• Four customizable focus-hold buttons

• Customizable function ring

• Focus-range limiter and Full-Time DMF

• Dust- and moisture-resistant construction

• Fluorine-coated front element

• Professional removable tripod mount

• Full-frame Sony E-mount compatibility

Remarkably Lightweight 400mm Design

The FE 400mm F4.5 GM OSS weighs only approximately 994g, excluding its removable tripod foot. This makes it the world’s lightest full-frame 400mm f/4.5-or-faster super-telephoto lens at the time of its September 2026 announcement.

At only 242mm long, the lens is substantially easier to carry and maneuver than traditional professional super-telephoto primes. Its carefully balanced design reduces strain during extended handheld shooting and makes it easier to follow birds, athletes, aircraft, and other unpredictable subjects.

G Master Optical Performance

An advanced 22-element, 16-group optical design incorporates Super ED and ED glass elements to minimize chromatic aberration and preserve fine detail throughout the image.

Sony’s Nano AR Coating II suppresses flare and ghosting, maintaining strong contrast and natural color even when photographing backlit wildlife, outdoor sports, and other subjects in difficult lighting.

The result is outstanding corner-to-corner resolution suitable for high-megapixel Sony Alpha cameras and demanding professional applications.

Beautiful Subject Separation

The combination of a 400mm focal length and bright f/4.5 maximum aperture creates strong subject isolation with beautifully compressed backgrounds.

An 11-blade circular diaphragm and individually optimized spherical aberration produce smooth, rounded highlights and creamy G Master bokeh. This refined rendering helps wildlife, athletes, performers, and other distant subjects stand out clearly from distracting surroundings.

Dual XD Linear-Motor Autofocus

Two Sony XD Linear Motors deliver fast, accurate, and quiet autofocus. A refined control algorithm helps the lens take full advantage of the advanced subject-recognition and tracking systems in current Sony Alpha cameras.

The focusing system can keep pace with continuous shooting at up to 120 fps on the compatible Sony Alpha 9 III, making the lens well suited for birds in flight, field sports, motorsports, racing, and other high-speed subjects.

Quiet operation also benefits video production and wildlife photography in noise-sensitive environments.

Optical SteadyShot Stabilization

Built-in Optical SteadyShot helps stabilize the image in the viewfinder and reduce camera shake when photographing handheld at 400mm.

Selectable stabilization modes allow the system to be tailored to different subjects and camera movements:

• Mode 1: General handheld photography

• Mode 2: Panning with moving subjects

• Mode 3: Dynamic subjects with unpredictable movement

On compatible Sony cameras, lens stabilization works together with the camera’s in-body stabilization system for more effective control of camera shake.

Extend Your Reach to 800mm

The FE 400mm F4.5 GM OSS is compatible with Sony’s optional full-frame E-mount teleconverters.

• Sony 1.4x Teleconverter: 560mm f/6.3

• Sony 2x Teleconverter: 800mm f/9

This flexibility allows photographers to increase their working distance or fill the frame with smaller and more distant subjects while retaining autofocus and optical stabilization with compatible equipment.

When mounted on an APS-C Sony camera, or when a full-frame camera is operated in APS-C crop mode, the lens provides an angle of view equivalent to approximately 600mm before adding a teleconverter.

Designed for Professional Control

Controls are positioned for fast access during demanding assignments:

• Four focus-hold buttons

• AF/MF focus-mode switch

• Full-Time DMF switch

• Focus-range limiter

• Optical SteadyShot on/off switch

• Stabilization-mode selector

• Customizable function ring

• Linear Response manual focusing

• Removable tripod mount

The four focus-hold buttons are positioned around the barrel for convenient operation in horizontal or vertical orientation.

Customizable Function Ring

The lens’s function ring can be assigned to supported operations on compatible Sony cameras, including:

• APS-C/full-frame switching

• Preset Focus

• Power Focus

This provides rapid access to frequently used functions without requiring the photographer to move a hand away from the lens.

Fast Manual-Focus Override

When Full-Time DMF is enabled, rotating the focusing ring immediately provides manual-focus control—even while the camera is operating in an autofocus mode.

This can be particularly helpful when autofocus locks onto foreground vegetation, fencing, branches, or another object between the photographer and the intended subject.

A focus-range limiter can also restrict the available focusing distance to improve autofocus speed when the subject remains within a predictable range.

Made for Wildlife and Sports Video

Focus breathing is effectively suppressed to help maintain consistent framing during focus transitions. Quiet autofocus and aperture operation reduce unwanted mechanical noise during recording.

Linear Response MF provides a predictable, direct manual-focusing response, while the function ring can support Power Focus operation with compatible cameras.

The manageable weight and balanced construction also make the lens practical for monopods, fluid heads, shoulder rigs, and specialized wildlife-video supports.

Built for Outdoor Assignments

Dust- and moisture-resistant construction improves reliability during outdoor sports, wildlife, and nature photography. The front element features a fluorine coating that helps prevent oil, moisture, fingerprints, and other contaminants from adhering to the glass.

The durable white exterior helps reduce heat buildup when the lens is used for extended periods in direct sunlight.

Ideal For

• Wildlife and bird photography

• Field and stadium sports

• Motorsports and racing

• Aviation and airshows

• Train and transportation photography

• Outdoor events

• Nature and conservation work

• Professional photojournalism

• Wildlife filmmaking

• Photographers who frequently shoot handheld

• Sony users seeking premium reach without traditional super-telephoto weight

How It Compares

Compared with the Sony FE 400mm F2.8 GM OSS

The 400mm f/2.8 provides substantially greater light-gathering capability, shallower depth of field, and maximum professional low-light performance. It is also much larger, heavier, and considerably more expensive.

The 400mm f/4.5 emphasizes portability and handheld freedom while retaining professional G Master optics, fast autofocus, stabilization, and teleconverter compatibility.

Compared with the Sony FE 100-400mm F4.5 GM OSS

The 100-400mm offers the flexibility to reframe quickly as subjects move closer or farther away. The 400mm prime is lighter, optimized specifically for the 400mm focal length, and provides the distinctive handling and rendering of a dedicated super-telephoto prime.

Compared with the Sony FE 200-600mm F5.6-6.3 G OSS

The 200-600mm provides greater framing flexibility and additional reach without a teleconverter. The 400mm f/4.5 is significantly lighter, brighter at 400mm, easier to maneuver, and provides premium G Master optics and bokeh.

Key Specifications

• Lens mount: Sony E

• Format: Full-frame

• Focal length: 400mm

• APS-C equivalent: Approximately 600mm

• Maximum aperture: f/4.5

• Minimum aperture: f/32

• Optical construction: 22 elements in 16 groups

• Angle of view on full frame: 6°10'

• Angle of view on APS-C: 4°10'

• Diaphragm blades: 11, rounded

• Minimum focusing distance: 2.5m / 8.21'

• Maximum magnification: 0.18x

• Autofocus system: Dual XD Linear Motors

• Image stabilization: Optical SteadyShot

• Stabilization modes: 3

• Filter size: 95mm

• Teleconverter compatibility: Sony SEL14TC and SEL20TC

• Tripod mount: Removable

• Dimensions: Approximately 108 × 242mm

• Weight: Approximately 994g / 35.1 oz., excluding tripod foot

• Model: SEL400F45GM

• UPC: 027242934429

In the Box

• Sony FE 400mm F4.5 GM OSS Lens

• ALC-SH189 Lens Hood

• ALC-F95S Front Lens Cap

• ALC-R1EM Rear Lens Cap

• Removable Tripod Mount

• Lens Strap

• Soft Lens Case

• Case Strap

• Documentation

Complete Your Kit

Consider pairing this lens with:

• Sony Alpha 1, Alpha 1 II, or Alpha 9 III camera

• Sony SEL14TC 1.4x Teleconverter

• Sony SEL20TC 2x Teleconverter

• 95mm protective or circular polarizing filter

• Heavy-duty monopod

• Gimbal head or fluid video head

• Fast CFexpress Type A or SD memory card

• Extra camera batteries

• Rain protection

• Comfortable camera or lens-carrying system

Why Buy From Cameragraphics?

Cameragraphics is a Sony Authorized Dealer offering genuine Sony equipment with full manufacturer warranty coverage. Our professional photographers can help you select the right Sony camera, teleconverter, support system, memory card, and accessories for wildlife, sports, aviation, and professional outdoor photography.

Cameragraphics — Serving Auburn Since 1974.