• E-Mount Lens/Full-Frame Format
• Aperture Range: f/2.8 to f/22
• Three Fluorite Elements, One ED Element
• Nano AR and Fluorine Coatings
• XD Linear Motor AF System
• Optical SteadyShot Image Stabilization
• Power Focus, Preset Focus, Focus Limiter
• Weather-Sealed Magnesium-Alloy Design
• Fixed, Rotating Tripod Collar
• Rounded 11-Blade Diaphragm

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 class, 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 SEL400F28GM 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 SEL400F28GM, 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 SEL400F28GM allows the narrow depth of field achievable with a 400mm F2.8 lens to be utilized to create images with deep, lush, defocused backgrounds.

Dust and moisture resistance maintains reliability in harsh environments

Dust and moisture resistant design provides the reliability needed for outdoor use in harsh conditions.

Built-in optical image stabilization with new Mode 3

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 3 setting with an advanced algorithm that ensures easier framing when following moving subjects. Mode 3 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.

Power Focus

When the function ring select switch is set to FUNCTION and the function ring is rotated, focus shifts smoothly at a speed determined by the amount of function ring rotation. This allows smooth focus shift for movies.

Focus range limiter

The focus range limit switch allows a limited focus range to be selected when the fastest possible focusing is required. Three settings are provided: FULL, 7m-2.7m, and ∞-7m.

Full-time DMF

When the FULL TIME DMF switch is ON, manual focus is immediately engaged by simply rotating the focus ring, even while shooting in the AF-C mode. If AF causes focus to shift to a different subject while shooting, the focus ring can be used to quickly bring focus back to the desired subject. In situations where the user wants to fine tune focus manually after initial AF, the body’s shutter button half-press focus function can be turned off and AF assigned to a different button, making it easy to use the focus ring for final focus after initial AF has been achieved. The ability to instantly switch to manual focus can also be useful when it is necessary to focus beyond a set focus range limit.