New A1 MTF measuring system.

Each lens is checked for previously undetectable high-frequency details using 46-megapixel Foveon direct image sensors.

Flare and ghosting reduction

SIGMA's Super Multi-Layer Coating reduces flare and ghosting to help photographers produce sharp and high contrast images even in backlit conditions.

High-precision, rugged brass bayonet mount

Its treated surfaces and enhanced strength contribute to the exceptional durability of the lens.

Lens construction
Lens construction	7 elements in 5 groups
Minimum aperture	F22
Filter size	φ46㎜
Angle of view	39.6° (Sony E-mount 26.6 degrees)
Minimum focusing distance	30cm / 11.8in
Dimensions (diameter x length)	Φ60.8㎜ × 40.5㎜/ 2.4in x 1.6in
Number of diaphragm blades	7 (rounded diaphragm)
Maximum magnification ratio	1：8.1
Weight	140ｇ/4.9oz
	All figures based on Micro Four Thirds system. Appearance and specifications are subject to change without notice.
Corresponding AF mounts	Micro Four Thirds/Sony E-mount