Sigma 400mm F5.6 APO
Launched February 1980

Sigma 400mm F5.6 APO Telephoto

Due to the new optical design, the Apochromatic results have been obtained without using Fluorite glass elements (Patent pending). The substantial reduction in colour aberration results in crisp, high contrast pictures images. In addition, the internal focusing mechanism allows for the quick focusing and close focusing capabilities.

Construction 7 Elements in 5 Groups
Focal Length 400mm
Maximum Aperture ƒ5.6
Minimum Aperture ƒ22
Field of View
Minimum Focus Distance 300cm
Number of blades N/A
Maximum Magnification N/A
Zooming System N/A
Filter Size 77mm
Diameter 86mm (max.)
Length 267.5mm
Weight 1,460g
SRP at launch: N/A
Available Mounts: MF