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.

Newly developed XD (extreme dynamic) Linear Motor achieves extremely fast, precise, quiet AF

The XD Linear Motors used in the Sony 400mm F2.8 GM OSS lens have been newly developed to deliver higher thrust and efficiency than conventional types in order to make the most of the rapidly evolving speed performance of current and future camera bodies. Linear motor design and component layout have been thoroughly revised to achieve significantly higher thrust. Two of these new motors are used in the 400mm F2.8 GM, achieving up to a 5x improvement in moving-subject tracking performance. This means that the full speed performance of advanced camera bodies can be applied to capturing perfect images of the most dynamic sports or wildlife subjects. The XD motors are further supported by new algorithms developed specifically for them, notably improving the motors’ response to control signals and minimizing lag and instability that can occur when driving a large aperture focus lens group for quiet, low-vibration operation. 

Extraordinary G Master resolution

All lenses bearing the G Master brand are designed to extremely high standards, ensuring that outstanding contrast at high spatial frequencies is maintained right out to the image edges. The optical design includes three fluorite elements that help to minimize axial chromatic aberration that can be a problem in large-aperture lenses, as well as lateral chromatic aberration that can reduce resolution towards the image periphery. Colour bleeding is effectively suppressed, allowing clear reproduction of the finest subject details.

Natural, beautiful G Master bokeh

In addition to careful control of spherical aberration at the design stage, each lens is individually tested and adjusted during manufacture to achieve the highest possible bokeh quality. An 11-blade circular aperture mechanism further contributes to smooth circular bokeh. The 400mm F2.8 GM allows the narrow depth of field achievable with a 400mm F2.8 lens to be utilized to create images with deep, lush, defocused backgrounds.

Durable construction with dust & moisture resistance

Dust and moisture resistant design provides the reliability needed for outdoor use in harsh conditions. Plus a durable magnesium alloy is used not only for the lens barrel exterior and tripod mount, but also for interior barrel components as well. This provides the tough durability that demanding professional application require, while minimizing overall weight.

Fluorine front-element coating

The front lens element features a fluorine coating that helps to prevent dirt and fingerprints from sticking, while making it easier to wipe dirt and fingerprints away if they do become attached to the lens surface.

Includes carbon fiber lens hood

The supplied lens hood is made of strong, lightweight carbon fiber, with interior flocking for optimum light control.

Built-in optical image stabilization with new Mode

Optical image stabilization is built in, making it easier to capture sharp images when shooting handheld. In addition to the Mode 2 setting that is provided for panning shots, the SEL400F28GM features a new Mode 37 setting with an advanced algorithm that ensures easier framing when following moving subjects. Mode 37 provides optimum stabilization for tracking and shooting dynamic, unpredictable sports action. 5-axis image stabilization becomes available when the SEL400F28GM is used with an α body that features in-body image stabilization.

Customizable focus hold buttons in four locations

Focus hold buttons are provided in four locations on the lens barrel for easy access in any shooting situation. The focus hold buttons can be customized via a camera body menu, allowing them to be assigned a function selected by the user: Eye AF, for example.

Function ring provided for the first time

The SEL400F28GM includes a new function ring with switch selectable PRESET (preset focus) and FUNCTION settings. Functions such as Power Focus can be assigned to the FUNCTION mode via a camera body menu. 

Drop-in filter slot

The SEL400F28GM includes a filter slot that accepts ø 40.5mm ND and other filter types, as well as the optional VF-DCPL1 drop-in circular polarizer. The VF-DCPL1 circular polarizer can be rotated to achieve the desired polarization while installed in the lens.