FE 400mm F4.5 GM OSS

Released September 2026

A full-frame E-mount 400 mm prime for distant subjects, with optical stabilisation and a 994 g lens weight excluding its tripod mount.

Mount: Sony E
Focal length: 400 mm
Max aperture: f/4.5
Stabilisation: Yes
Weight: 994 g

What reviewers say

Both praise sharp images, fast quiet autofocus and comfortable handheld use, and dislike the missing Arca-Swiss tripod plate. PetaPixel questions the fixed focal length’s versatility and finds manual focusing imprecise; Amateur Photographer finds the focus ring useful and considers 400mm versatile for wildlife, sport and portraits.

From petapixel.com and amateurphotographer.com

Specifications

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Optics

Lens type: Prime
Focal length: 400 mm
Maximum aperture: f/4.5
Minimum aperture: f/32
Optical construction: 22 elements in 16 groups
Special elements: Three Super ED elements and one ED element
Coatings: Nano AR Coating II; fluorine front-element coating
Diaphragm: 11 rounded blades
Angle of view: 6°10′ full frame; 4°10′ APS-C

Mount and compatibility

Mounts: Sony E
Image circle: Full frame
Image circle detail: Full-frame coverage; 600 mm equivalent field of view on APS-C
Teleconverter support: Compatible with SEL14TC and SEL20TC; Sony confirms up to 800 mm with 2×. Amateur Photographer gives 840 mm in one paragraph; the physical 400 mm focal length and 2× factor give 800 mm.

Focus and stabilisation

Autofocus: Yes
Minimum focus distance: 2.5 m
Maximum magnification: 0.18×
Optical stabilisation: Yes
Autofocus detail: Two XD linear motors; up to 120 fps AF/AE tracking with Alpha 9 III under Sony test conditions, not a universal camera limit
Stabilisation detail: Built-in Optical SteadyShot; coordinated stabilisation and Active Mode require compatible cameras. Sony publishes no stop rating.
Video features: Breathing compensation with compatible cameras

Design

Dust and moisture resistant: Yes
Filter diameter: 95 mm
Maximum diameter: 108 mm
Length: 242 mm
Weight: 994 g
Controls: Four customisable focus-hold buttons, function ring, focus-range limiter, full-time DMF, AF/MF and stabilisation mode switches
Filter detail: 95 mm front filter; Amateur Photographer’s table gives 85 mm, but maker specification is used
Weather resistance: Dust- and moisture-resistant design; not guaranteed completely dust- or moisture-proof
Weight detail: Approximately 994 g excluding tripod mount; separately supplied hood, caps, straps and case excluded
Tripod mount: Supplied tripod mount; reviews note the foot has no integrated Arca-Swiss plate
Lens hood: ALC-SH189 round bayonet hood
In the box: ALC-SH189 hood, ALC-F95S front cap, ALC-R1EM rear cap, soft case, lens strap, case strap and tripod mount
Release detail: Sony UK announced on 15 September 2026 with availability from the end of September 2026; exact first-sale day is not published. Sony Japan gives 9 October 2026 for that market. UK approximate launch price is £2400.

Pros and cons

Pros

Optical stabilisation
1.4× and 2× teleconverter support
994 g excluding tripod mount

Cons

Fixed focal length
Minimum focus distance of 2.5 m

Closest rivals

Model	Mount	Focal length	Max aperture	Stabilisation	Weight	Released
SonyFE 600mm F6.3 GM OSS	Sony E	600 mm	f/6.3	Yes	995 g	Sept 2026
SonyFE 400mm F2.8 GM OSS	Sony E	400 mm	f/2.8	Yes	2,895 g	Sept 2018
SonyFE 300mm F2.8 GM OSS	Sony E	300 mm	f/2.8	Yes	1,470 g	Jan 2024

Sources

Photo: sony.jp

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