Sony Announces the FE 100-400mm f/5.6-8 OSS, a 654 g Super-Telephoto Zoom for $849.99

Sony has introduced the Sony FE 100-400mm f/5.6-8 OSS, a super-telephoto zoom for 35mm full frame Alpha E-mount cameras. The headline figure is weight: the lens covers the full 100-400mm range at approximately 654 g, which places it well below the size and mass of the professional-tier telephoto zooms that have defined this focal range for Sony shooters. The tradeoff is aperture. At f/5.6 wide and f/8 at 400mm, this is a slower lens than the f/4.5-5.6 and f/5.6-6.3 options above it in the lineup, and it is aimed squarely at daylight shooting of birds, sports, trains, and aircraft rather than at low-light work.

The optical formula uses two ED (extra-low dispersion) glass elements and two aspherical elements to control color fringing and distortion through the zoom range. Sony pairs that with a nine-blade circular aperture and spherical aberration optimization, which is the standard approach to keeping out-of-focus areas smooth on a lens that will spend most of its life isolating subjects against distant backgrounds. Close-focus performance is a genuine strength here: the lens focuses to 0.86 m at the telephoto end and 1.13 m at the wide end, with a maximum magnification of 0.41x. That magnification figure edges into serious close-up territory for a zoom of this reach, and it means flowers and insects are as viable a target as a hawk on a fence post.

Autofocus runs on a linear motor drive, and Sony says the lens supports continuous shooting with autofocus and auto exposure tracking at up to approximately 120 frames per second on the Sony a9 III. Optical image stabilization is built into the lens, and it coordinates with in-body stabilization and Active Mode on compatible bodies for handheld stills and video. The lens also supports in-camera breathing compensation, which corrects the framing shifts that occur as focus position changes during movie recording.

On the handling side, Sony has included a customizable focus hold button, a focus mode and range switching dial, and a zoom lock switch. The barrel carries a dust and moisture resistant design, which Sony notes is not a guarantee of complete sealing, and a lens hood ships in the box. For additional reach, the lens accepts the Sony FE 2x Teleconverter (SEL20TC), sold separately, which takes the long end to 800mm on full frame or an equivalent 1,200mm in APS-C crop mode.

"With the needs of a large set of hobbyist photographers in mind, from birders to parents, we used our expertise in professional lens technology to create a high-quality, affordable super-telephoto zoom lens that will go the distance," said Yang Cheng, Vice President of Imaging Solutions, Sony Electronics.

Key Specs

• Mount: Sony E-mount, 35mm full frame coverage
• Focal length: 100-400mm
• Maximum aperture: f/5.6-8
• Optical design: two ED glass elements, two aspherical elements
• Aperture: nine blades, circular
• Minimum focusing distance: 0.86 m at the telephoto end, 1.13 m at the wide end
• Maximum magnification: 0.41x
• Autofocus: linear motor drive
• Continuous shooting support: up to approximately 120 frames per second with autofocus and auto exposure tracking on the Sony a9 III
• Stabilization: built-in optical image stabilization, compatible with in-body Active Mode and coordinated stabilization control on supported bodies
• Breathing compensation: supported on compatible bodies
• Teleconverter compatibility: Sony FE 2x Teleconverter (SEL20TC), reaching 800mm on full frame and an equivalent 1,200mm in APS-C mode
• Controls: customizable focus hold button, focus mode and range switching dial, zoom lock switch
• Build: dust and moisture resistant design
• Included accessories: lens hood
• Weight: approximately 654 g
• Price: $849.99 USD / $1,079.99 CAD
• Availability: September 2026

Why This Matters

The practical significance of this lens is the combination of weight and price rather than any single optical claim. Super-telephoto reach has historically demanded either a large financial commitment or a large physical one, and usually both. A 654 g zoom that reaches 400mm changes the calculation for anyone who has skipped wildlife or sports work because the gear made the trip unappealing. It fits a shoulder bag alongside a normal zoom, it can be carried on a hike without a dedicated harness, and it can be handheld for extended stretches without the fatigue that leads to missed frames. At $849.99, it also sits at a price point where the lens can be a first telephoto purchase rather than a considered upgrade.

For video, the relevant details are the coordinated stabilization and breathing compensation. Handheld long-lens footage is unforgiving, and a lens that works with a body's Active Mode gives creators a realistic path to usable handheld telephoto video without a gimbal that can support the rig. Breathing compensation matters for any focus pull at these focal lengths, where even small framing shifts read as obvious on screen. The quiet linear motor drive is also a meaningful consideration for anyone recording audio in-camera.

The aperture is the honest limitation. At f/8 on the long end, this lens asks for good light or a willingness to push ISO, and the shallower depth of field that faster telephotos deliver will not be available. Modern high-ISO performance and denoising tools absorb much of that penalty for still photography, but shooters working at dawn, dusk, or under stadium lights will feel the constraint. Adding the 2x teleconverter compounds it further, since the effective aperture drops two stops from an already modest starting point.

The 0.41x magnification deserves more attention than it will probably get. A lens that reaches 400mm and also focuses close enough for near-macro framing removes a second lens from the bag for anyone shooting nature broadly rather than specializing. Butterflies, dragonflies, and flowers become part of the same outing as distant birds, and the working distance at 0.86 m is generous enough to avoid spooking skittish subjects.

Sample Images

Conclusion

The FE 100-400mm f/5.6-8 OSS is a clear statement about where Sony sees growth in its lens lineup: not at the top, where the professional telephotos already exist, but in the gap between kit zooms and serious wildlife glass. The design decisions are consistent with that target. Weight and price were protected, aperture was spent, and the features that matter most to handheld shooting were kept. Whether the optics hold up at the extremes of the zoom range is a question only testing will answer, but the specification sheet describes a lens that a lot of people have been asking for. It ships in September 2026 for $849.99.