Sigma 70-300mm f/4–5.6 APO DG Macro lens

The Sigma 70-300mm F4-5.6 APO DG Macro lens is a consumer-level, telephoto zoom lens made by Sigma Corporation. Different versions of this lens are produced that work with cameras from Canon, Nikon, Pentax, Konica Minolta, Sony and Sigma. Additionally, Olympus' 70–300 f/4–5.6 lens for Four-Thirds has the same optical design and specifications as this lens. The lens is packaged with a lens hood.

Sigma 70–300 mm APO DG Macro

Maker	Sigma
Technical data
Type	Zoom
Focal length	70–300mm
Aperture (max/min)	f/4 – f/5.6
Close focus distance	150cm / (95cm Macro mode)
Max. magnification	1:4.1 / 1:2(Macro mode)
Diaphragm blades	9
Construction	14 elements in 10 groups
Features
Short back focus	No
Ultrasonic motor	No
Lens-based stabilization	No
Macro capable	Yes
Application	Consumer Telephoto Zoom
Physical
Max. length	122
Diameter	76.6
Weight	550
Filter diameter	58mm

Sigma's APO designation signifies an apochromatic lens that uses low dispersion glass to minimize chromatic aberration. The APO version has a red ring on the end of the lens body to distinguish it from the non-APO version of the lens, the Sigma 70-300mm F4-5.6 DG Macro.

This lens has 14 elements in 10 groups including two special low dispersion glass elements in the front lens group, and one in the rear lens group. The non-APO version has only one such element in the rear.

An additional feature to this lens is a macro option between 200–300mm. The minimum focusing distance between 200 and 300mm is 95 cm (37.4 inches). It is enabled by a manual switch and provides a maximum magnification of 1:2.