Another new Sigma lens based on the Four Third System is the telephoto zoom APO 135 - 400mm F4.5 - 5.6 DG lens. The lens focal length is equivalent to 270-800mm in the Four Third System and it has a minimum aperture of 22.

The new Sigma APO 135 - 400mm F4.5 - 5.6 DG lens has an angle of view of 9.2° - 3.1° and a maximum magnification of 1:5.3. The new lens also has the most current lens coating technology thus getting rid of chromatic aberrations usually associated with digital cameras. Thanks to the Rear Focusing System one is able to focus without any hassles and the lens comes bundled with a removable tripod collar.

Sigma APO 135-400mm F4.5-5.6 DG Lens Specifications
Mount Type Four Thirds
Minimum Aperture F22
Lens Construction 13 Elements in 11 Groups
Angle of View 9.2° - 3.1°
Number of Diaphragm Blades 9pcs
Minimum Focusing Distance 200cm (78.7”) - 220cm (86.6”)
Maximum Magnification 1:5.3
Filter Size 77mm
Lens Hood Bayonet type Hood
Dimensions Diameter 83.5mm (3.3”) x Length 189mm (7.4”)
Weight 1280gr / 45.1oz
UPC No. 0085126 727581