Comparison of Pentax SMC P-FA 80-200mm f/2.8 ED IF and Sigma 70-200mm f/2.8 DG OS HSM Sports

Attribute	Sigma 70-200mm f/2.8 DG OS HSM Sports ×	Pentax SMC P-FA 80-200mm f/2.8 ED IF ×
Diagonal Angle of View (degree)	12.30 - 34.30	12.50 - 30.50
Notes	Optical Image Stabilization; Available AF Mounts: Sigma SA, Canon EF, Nikon F	Included Accessories: Lens Hood
Aperture (f)	2.80 - 22.00	2.80 - 32.00
Magnification Ratio (x)	0.21	0.19
Filter Size (mm)	82	77
Diaphragm Blades	11	-
Type	Telephoto Zoom	Telephoto Zoom
APS Equivalent	1.5x: 105 - 300mm; 1.6x: 112 - 320mm	120 - 300mm
Lens Construction	24 elements in 22 groups, including 1 SLD and 9 FLD elements	16 elements in 13 groups, including 1 ED element
Image Circle	35mm	35mm
Focal Length (mm)	70.00 - 200.00	80.00 - 200.00
Brand	Sigma	Pentax
Name	Sigma 70-200mm f/2.8 DG OS HSM Sports	Pentax SMC P-FA 80-200mm f/2.8 ED IF
Weight (g)	1805	1571
Zoom System	Rotary; Internal	Rotary
Focus Details	Internal; HSM with full-time manual override; Focus mode, hold and limit switches	Internal
Diameter (mm)	94.2	86.4
Length (mm)	202.9	191
Diaphragm Blades Type	rounded	-
Closest Focus (m)	1.2	1.4