Comparison of Sigma APO 120-300mm f/2.8 EX DG HSM and Sigma APO 120-300mm f/2.8 EX IF HSM

Attribute	Sigma APO 120-300mm f/2.8 EX DG HSM ×	Sigma APO 120-300mm f/2.8 EX IF HSM ×
Filter Size (mm)	105	105
Notes	Available AF Mounts: Sigma, Canon, Nikon	Available AF Mounts: Sigma, Canon, Nikon
Closest Focus (m)	1.5	1.5
Magnification Ratio (x)	0.12	0.12
Type	Telephoto Zoom	Telephoto Zoom
Length (mm)	271	271
APS Equivalent	1.5x: 180 - 450mm; 1.6x: 192 - 480mm	1.5x: 180 - 450mm; 1.6x: 192 - 480mm
Zoom System	Rotary; Internal	Rotary; Internal
Image Circle	35mm	35mm
Focal Length (mm)	120.00 - 300.00	120.00 - 300.00
Brand	Sigma	Sigma
Name	Sigma APO 120-300mm f/2.8 EX DG HSM	Sigma APO 120-300mm f/2.8 EX IF HSM
Weight (g)	2600	2600
Aperture (f)	2.80 - 32.00	2.80 - 32.00
Diaphragm Blades	9	9
Diagonal Angle of View (degree)	8.20 - 20.40	8.20 - 20.40
Lens Construction	18 elements in 16 groups, including 4 SLD elements	18 elements in 16 groups, including 4 SLD elements
Diameter (mm)	112.8	112.8
Focus Details	Internal; HSM with full-time manual override	Internal; HSM with full-time manual override