SKU: 15364562238

Sony FE 400mm F2.8 GM OSS

Sale price$5714.99 Regular price$6349.99
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Description

Sony FE 400mm F2.8 GM OSSSony FE 400mm F2. 8 GM OSS Sony SKU: SEL400F28GM Helix SKU: SYSEL400F28GM Overview Innovative G Master F2. 8 super telephoto Sony's most advanced lens technologies have been unsparingly applied in this large aperture super telephoto lens, achieving extraordinary speed, outstanding G Master resolution and bokeh, plus professional control and reliability. Moreover, the SEL400F28GM is the lightest super telephoto lens in its class2, providing

Sony FE 400mm F2.8 GM OSS

Sony SKU: SEL400F28GM | Helix SKU: SYSEL400F28GM

Overview

Innovative G Master F2.8 super telephoto

Sony's most advanced lens technologies have been unsparingly applied in this large-aperture super telephoto lens, achieving extraordinary speed, outstanding G Master resolution and bokeh, plus professional control and reliability. Moreover, the SEL400F28GM is the lightest super telephoto lens in its class2, providing unparalleled handheld shooting freedom.

Speed that maximizes body performance

New XD (extreme dynamic) Linear Motors deliver higher thrust than conventional types, achieving up to a 5x improvement3 in moving-subject tracking performance with current and future camera bodies. Two of these new motors and newly developed algorithms quietly drive the lens's large focus lens group faster and more precisely than ever before. The full speed performance of advanced camera bodies can be applied to capturing dynamic sports or wildlife subjects.

tunning G Master resolution and bokeh

Extremely high design standards ensure outstanding resolution right out to the image edges. Three fluorite elements minimize chromatic aberration. Spherical aberration is carefully controlled during design and manufacture to achieve the highest possible bokeh quality. Optional high-performance 1.4x and 2.0x tele-converters are supported4, providing outstanding resolution and contrast even at 800 mm.

The world's lightest2 at just 102.2 oz (2,895 g)

An innovative optical design that includes three fluorite elements reduces the number of elements at the front of the lens barrel for a low weight of 102.2 oz (2,895 g). Durable magnesium alloy components also contribute to reduced weight. Portability and handling are outstanding, and ideal balance affords agile, easy operation whether shooting handheld or on a monopod.

Durability and reliability for challenging conditions

The dust- and moisture-resistant design5 provides the reliability needed for outdoor use in harsh conditions. A durable magnesium alloy used for the lens barrel exterior, tripod mount, and interior barrel components achieves tough durability while minimizing overall weight. The front lens element features a fluorine coating that helps to keep it clean while making it easier to wipe dirt and fingerprints away.

Features for professional shooting needs

Full-time DMF allows manual focus to be engaged simply by rotating the focus ring, even while shooting in AF-C mode. Optical image stabilization is built in, and a new Mode 36setting features an advanced algorithm that provides optimum stabilization for dynamic sports action while also making framing easier. Four focus-hold buttons and a focus ring with Linear Response MF further enhance versatility.

Lens Configuration

G Master series lenses take imaging and expression to previously unattainable levels with a stunning blend of extremely high resolution and softly dissolving background bokeh

[1] Fluorite lens [2] ED glass 

MTF Chart

MTF (Modulation Transfer Function) describes how well a lens can reproduce fine details, measured as the degree of contrast achieved between finely spaced lines.

[1] Contrast (%) [2] Distance from optical center of lens (mm) [3] Max. aperture [4] F8 aperture [5] Spatial frequency [6] 10 line pairs / mm [7] 30 line pairs / mm [8] R: Radial values T: Tangential values

Specifications
MOUNT
Sony E-mount
FORMAT
35 mm full frame
FOCAL LENGTH (MM)
400
35 MM EQUIVALENT FOCAL LENGTH (APS-C)
600
LENS GROUPS / ELEMENTS
17-23 *Including one filter
ANGLE OF VIEW (35 MM)
6°10'
ANGLE OF VIEW (APS-C)
4°10'2
MAXIMUM APERTURE (F)
2.8
MINIMUM APERTURE (F)
22
APERTURE BLADES
11
CIRCULAR APERTURE
Yes
MINIMUM FOCUS DISTANCE
8.86 ft (2.7 m)
MAXIMUM MAGNIFICATION RATIO (X)
0.52
FILTER DIAMETER (MM)
40.5 (slot-in)
IMAGE STABILIZATION (STEADYSHOT)
Optical SteadyShot
TELECONVERTER COMPATIBILITY (X1.4)
SEL14TC
TELECONVERTER COMPATIBILITY (X2.0)
SEL20TC
HOOD TYPE
Round shape

Size & Weight

DIMENSIONS (DIAMETER X LENGTH)
6-1/4 x 14-1/4" (158.1 x 359 mm)
WEIGHT
102.2 oz (2,895 g)
Item Includes
  • Hood (model): ALC-SH155
  • Lens front cap: Supplied
  • Lens rear cap: ALC-R1EM
  • Hard case
  • Lens strap
  • Case strap
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 15364562238

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4.6 ★★★★★
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Verified Purchase
Kevin Moody
Chelsea, US
★★★★★ 5
Solid, Well‑Built Adapter with Excellent Performance
I bought this adapter for my M1 MacBook Air so I could properly test the speeds on my new 2Gb internet service. During installation, my old cheap USB‑C Ethernet adapter kept capping out at 1Gb, and even the tech suggested the adapter was the bottleneck. After he left, I ordered this UGREEN model. I’ve had great luck with their products before and it did not disappoint. It has a solid, heavier feel with what seems like a metal casing, and it worked instantly. macOS recognized it right away with no drivers needed. I simply turned off Wi‑Fi, plugged it in, connected the Ethernet cable, and I was online immediately. My very first speed test hit right at 2Gb, and it’s been consistently fast and stable ever since. I also haven’t noticed any heat issues at all. Overall, a fantastic upgrade and absolutely worth it if you need true multi‑gig speeds on a Mac.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
C
Verified Purchase
CH
Cuba, US
★★★★★ 5
Reliable network speed tests and smb speeds
Got this on prime day for about $20 USD. For the price and quality it was definitely worth! Works perfectly and as you would expect. No driver installations or dropped connections so far, just plug and play. Sleek design, gets a little warm (which is expected) but not hot at all. Tested on compatible internal network speeds which showed to be reliable and fast Hardware tested on: - base m4 mac mini connected via usb c ugreen 2.5g adapter - over cat7 ethernet cable (overkill but cat6/cat5e under 100meters/328ft should be enough) - 2.5g ethernet switch - 2.5g port on nas iperf3 tests: - iperf3 tests from base m4 mac mini to another 2.5g device on a 2.5g switch - shows average bitrates of ~2.35 Gbits/sec smb tests from a usb3 connected to base m4 mac mini: - only took ~2mins to transfer 31.31 GB for 11 files in varying sizes - which on average came out to around a transfer rate of 2.087gbps - which is about 260.88 Megabytes per second - i'd imagine this would even be slightly faster for files directly on the mac but wanted to test with a real scenario - probably closer 290-300 Megabytes per second for files stored on the device rather than usb3 have not had a need to test this on mobile yet but iphones with the 10g usbc (and probably just usbc in general) should be fine i'm sure if you're looking into buying one of these you already know all this but some things to keep in mind. your mileage may vary based on your cable length and runs/environment surrounding your network/cables for any electromagnetic interference. but generally as long as you have 2.5gb compatible ports and cabling and you should be good to go!
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Reviewed in the United States on July 11, 2025
P
Verified Purchase
pvinthebay
Fort Morgan, US
★★★★★ 5
Solid USB-C Upgrade for 2.5GbE - Good Value and Performance - Good for Mac Users
I’ve been using this Ugreen adapter for a 6 months now and it’s become one of my go-to accessories. If you have a device like the M1 MacBook Pro or Mac Mini that’s limited to 1Gb Ethernet, this adapter is a great way to unlock faster speeds, especially if you’re upgrading your home or office network to 2.5GbE. I have everything connected to a 10Gb switch after I upgraded my Synology NAS and needed a way to improve access to it for storage. Setup was truly plug and play, just connect the Ethernet cable to one end, plug the USB-C into your device, and you’re good to go. I noticed an immediate improvement in transfer speeds when moving large files to my NAS. This is perfect for anyone working with media or large data sets where Wi-Fi just doesn’t cut it. I was initially capped at 200MB/s. It more than doubled when I used the adapter to 200MB/s At around $20, it’s excellent value when compared to higher-end adapters that cost much more but often deliver the same result. It’s compact, feels well made, and I’ve had zero issues with performance or stability. It does get slightly warm during long transfers, but I haven’t seen any drop in connection quality or speed. If you’re trying to squeeze more speed out of your Mac Mini, laptop, or even a docked tablet, this is a solid upgrade. I keep mine on the desk and switch it between devices as needed. Highly recommended for anyone moving to a 2.5Gb network or needing faster wired performance.
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Reviewed in the United States on July 27, 2025
W
Verified Purchase
Wes Candela
Alexandria, US
★★★★★ 5
MR. SULU… PREPARE FOR WARP SPEED. ENGAGE.
Rocket fast. Sleek, smooth design. Have another adapter from different company, which tends to fail when utilizing more than 1.5 GB. It just decides to downshift the first gear. This adapter does not. Speeds are scary. SpeedTest results are fun, watching the gauge being download teat and swing radically to the right. Pinned. Speeds coming in at 2,327 mb/s uploads at 2,150 mb/s (depending on time of day. Great for streaming content from laptop 4K, Dolby Vision Dolby Atmos, no problems… smooth no hiccups
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Reviewed in the United States on May 28, 2026
R
Verified Purchase
ROGER S.
Alexandria, US
★★★★★ 5
Great speed, connection sometimes blocked but there is a solution.
I wanted to take advantage of my 3gb fiber connection, and the best way was to connect my Mac M1 via Ethernet. This looked like a good solution. It started pretty good. I could almost max out my 2.5gb port on my switch. Then a strange thing started happening. At odd, but consistent, intervals, my connection would stop and say it was 'blocked'. If I waited, it would come back to active. If I switched Thunderbolt ports, it would come back instantly. Annoying. After a couple of days trying different ports, cables, DHCP vs static IP, and WiFi working flawlessly, I figured it was something in the Mac. Many Google searches directed me to the Thunderbolt Bridge. Apparently, this feature is to directly connect two Macs together IP for a high-speed connection. But it has been known to cause my issue. I removed the Thunderbolt Bridge service (I can add it back later if needed), rebooted, and have been working great for over a day now. Hopefully, this might help someone in the future.
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Reviewed in the United States on May 24, 2026

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