Sony FE 100-400mm f/5.6-8 OSS

This Sony zoom spans 100–400mm for Sony E full-frame cameras. It serves photographers who shoot distant subjects, such as birds, wildlife and outdoor sport.

At 100mm, you can include more surroundings around an animal or player. Zooming toward 400mm makes the subject larger from the same position. The range can reduce lens changes when the distance changes, though a nearby large subject may still need a wider lens.

The main trade-off is light gathering. The maximum aperture narrows from f/5.6 to f/8 across the zoom, so bright conditions help when action needs a fast shutter speed. Sony introduced the lens in 2026.

The lens weighs 1 lb 7.1 oz (654 g) and measures 6.48 in (164.5 mm) long. The small body suits walking with a telephoto lens. Consider the camera and lens together when choosing how to carry them. Screw-in filters must match the 67mm front thread.

At 400mm, a distant bird or player appears larger than at 100mm from the same position. The narrower view can make moving subjects harder to find. Start at a shorter setting to locate the action, then tighten the framing when it is in view.

The maximum aperture changes from f/5.6 at 100mm to f/8 at 400mm. On a dull morning or in woodland shade, you may need a higher ISO to retain enough shutter speed for movement. A still scene allows a slower shutter when the camera is steady.

At long settings, a nearby subject can have a soft background even at f/8. The distances involved matter. More space behind a bird makes separation easier, while branches directly behind it can remain distracting. Change viewpoint when the location allows.

Closest focus is 2.8 ft (86 cm) at 400mm, measured from the sensor. The minimum distance is longer at 100mm. Maximum magnification reaches 0.41x, useful for flowers and larger details. Leave room ahead of the glass and avoid shading a nearby subject.

OSS stabilization reduces camera shake and steadies the view while you frame. At 400mm, small hand movements have a greater effect on the image. Firm support is useful for slow exposures or long waits. A flying bird still needs enough shutter speed for its movement.

Dust and moisture resistance help outdoors. Use cover in persistent rain. Keep the camera connection clean and dry when changing lenses. Remove loose grit before wiping the front glass, especially after working near sand or soil.

A zoom lock secures the barrel for carrying. Release it before changing focal length. It is useful when moving between locations or putting the camera in a bag.

Two aspherical elements help correct distortion and spherical aberration, which can bend lines or soften detail. Two ED elements help reduce coloured fringes along high-contrast edges, such as a bird against bright sky. Internal focusing keeps barrel length unchanged while focus moves.