Specifications:

Focal length: 400mm
Maximum aperture: f/2.8
Minimum aperture: f/22
Lens mount: Sony E
Lens construction: 16 elements in 12 groups
Diaphragm blades: 11, rounded
Minimum focus distance: 7.9 feet (2.4 m)
Maximum magnification: 0.14x
Filter diameter: 77mm
Dimensions: 3.5 x 6.4 inches (89.5 x 162.5 mm)
Weight: 2.6 pounds (1,180 g)

Features:

Fast f/2.8 constant aperture: Provides excellent low-light performance and a shallow depth of field for creating beautiful bokeh effects.

Advanced optical design: Incorporates XA (extreme aspherical) elements and Super ED glass to minimize aberrations and deliver sharp, detailed images.

Nano AR Coating: Reduces flare and ghosting for enhanced image contrast and clarity.

Fast and accurate autofocus: Features two XD Linear Motors for rapid and precise focusing, even in challenging lighting conditions.

Optical SteadyShot (OSS): Provides effective image stabilization for handheld shooting, especially in low-light conditions.

Dust and moisture resistance: Built to withstand harsh conditions and protect against the elements.

Compact and lightweight design: Makes it easy to carry and use for various shooting scenarios.