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Buying decision

Should you buy it?

Buy the FE 400mm F4.5 GM at Sony's $2,699.99 preorder price (Oct 7, 2026; Sony lists October availability) if you shoot outdoor sports or larger wildlife on Sony E-mount and want a 400mm prime you can hand-hold all day, because TechRadar lists it at 994 g, about 165 g lighter than Nikon's 400mm f/4.5 and less than half the weight of Sony's 400-800mm zoom. PetaPixel (9 out of 10) found it extremely sharp wide open with very fast, quiet autofocus, and it takes Sony's 1.4x and 2x teleconverters for 560mm f/6.3 or 800mm f/9. PetaPixel also found the manual focus ring loose, the tripod foot isn't Arca-Swiss compatible, and the 2.5 m minimum focus distance (0.18x) made the reviewer back away from small birds, while TechRadar saw occasional soft frames on large mammals at f/4.5. Skip it for small birds or if you want zoom flexibility, since TechRadar's price table lists the FE 200-600mm G at $2,099 and the 400-800mm G at the same $2,699.

Measured view—/10What the pros say.

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Product data

Full specifications

45 attributes, grouped for quick scanning. Spot a wrong value? Hit the next to it.

Extender Compatible?: Y
Lens Hood Included / Model?: Y / ALC-SH151 Buy ►
Lens Length with Hood (Min-Max): 11.05 - 14.21” (280.6 - 360.9mm)
Lens Hood Size (DxL): 4.56 x 3.04” (115.9 x 77.1mm)
Lens Hood Weight: 3.9 oz (110g)
Rounded Aperture?: Y
Number of Aperture Blades: 9
Aperture Max by Focal Length: 100-115mm = f/4.5 116-161mm = f/5.0 162-400mm = f/5.6
Aperture Range - Wide / Long: f/4.5-32 / f/5.6-40
Lenses / Groups: 22/16
Lens Mounts Available: Sony E-mount

Tested Min Focus Distance (Wide / Long): 37.76” / 38.82” (959mm / 986mm)
Spec Min Focus Distance (Wide / Long): 38.58” (980mm)
Distance Scale? / Type: N

Case Included? / Type?: Y /
Image Stabilization? / Stops? / Tripod Sensing?: Y / /
Weather Sealed? / Filter Required?: Y /
Zoom Ring Lock Switch?: N
Tripod Ring Included? / Removable?: Y / Y
Zoom Ring Rotation: 95°
Maximum Magnification: 0.35x
Focus Limiter? / Focus Limiter Ranges: Y / Full 9.84' (3m) - ∞
Focus Ring Rotation: 270°
Full Time Manual Focus: Y
AF Motor Type: SSM
Internal Focusing? / Extends with Focusing?: Y / N
Zoom Extension Length: 3.16” (80.3mm)
Internal Zoom? / Extends with Zoom?: N / Y
Max Length at Full Extension: 11.4” (289.6mm)
Max Diameter at Tripod Ring: 4.9” (124.5mm)
Angle of View: Diagonal: 24° – 6° 10'
Image Circle: Full-Frame, APS-C
Year Introduced: 2017
Specifications: Sony FE 100-400mm F4.5-5.6 GM OSS Lens
Review: Specifications | Sony FE 100-400mm F4.5-5.6 GM OSS Lens

Release Year: 2026
Release Date: 2026-09-01

Filter Size: 77mm UV ► CP ►
Size of Rings: Focus / Zoom: 1.22” / 1.78” (31.1mm / 45.1mm)
Measured Size (DxL): 3.85 x 8.24” (98 x 209.3mm)
Manufacturer Spec Size (DxL): 3.7 x 8.07” (93.9 x 205mm)
In-Use Weight: 56 oz (1585g)
Tripod Ring Weight: 2.8 oz (80g)
Actual Weight: 49.2 oz (1395g)
Manufacturer Specification Weight: 49.2 oz (1395g)

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FE 400mm F4.5 GM OSS

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