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Long-lens reach without the usual bulk
Sony pairs a 400 mm F4.5 G Master prime with a 994 g, 242 mm-long body, making a focused super-telephoto setup more practical to carry and handle for wildlife, sports, and other distance work.
- Focal Length 400 mm
- Maximum Aperture F4.5
- Lens Mount Sony E
- Filter Size 95mm (Front)

Product Highlights
- 400 mm F4.5 super-telephoto prime lens for Sony E-mount systems
- 994 g (35.1 oz.) weight without tripod foot
- 242 mm (9-1/2 in.) overall length
- Super ED and ED glass help minimize aberration
- Nano AR Coating II helps suppress flare and ghosting in backlit scenes
- 11-blade circular aperture supports smooth background rendering
- Supports Sony SEL14TC and SEL20TC teleconverters
Product Information
The Sony FE 400mm F4.5 GM OSS is a 400 mm F4.5 super-telephoto prime lens for E-mount systems. Its compact, balanced design is built for mobile long-lens work, from wildlife and sports to trainspotting.
Built for a lighter long-lens setup
At 994 g (35.1 oz.) without its tripod foot and 242 mm (9-1/2 in.) long, this G Master prime is designed to keep a 400 mm perspective manageable for handheld shooting.
G Master optical control
Super ED and ED glass help minimize aberration, while Nano AR Coating II helps suppress flare and ghosting in backlit scenes. An 11-blade circular aperture and optimized spherical aberration support smooth background rendering.
Expand your reach when needed
The lens supports Sony SEL14TC and SEL20TC teleconverters. Function Ring assignments depend on the camera body; when an assignment is unavailable, Power Focus is used by default.
Note: Sony states that this lens is not guaranteed to be 100% dust and moisture proof.
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Sony FE 400mm F4.5 GM OSS Lens
| Lens | |
|---|---|
| Focal Length | 400 mm |
| Maximum Aperture | F4.5 |
| Lens Type | Super-telephoto prime |
| Model | SEL400F45GM |
| Optics | |
|---|---|
| Glass Elements | Super ED and ED glass |
| Coating | Nano AR Coating II |
| Aperture | 11-blade circular aperture |
| Physical | |
|---|---|
| Weight | 994 g (35.1 oz.), excluding tripod foot |
| Overall Length | 242 mm (9-1/2 in.) |
| Compatibility & Notes | |
|---|---|
| Teleconverters | Sony SEL14TC and SEL20TC supported |
| Function Ring | Assignable functions depend on the camera; Power Focus is assigned by default when a function is unavailable. |
| Dust & Moisture | Not guaranteed to be 100% dust and moisture proof. |











