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

Attribute	Pentax SMC P-FA 80-200mm f/2.8 ED IF ×	Sigma 70-200mm ƒ/2.8 EX DG OS HSM APO ×
Diagonal Angle of View (degree)	12.50 - 30.50	12.30 - 34.30
Notes	Included Accessories: Lens Hood	Image Stabilized. Available AF Mounts: Canon, Nikon, Pentax, Sigma, Sony. Included Accessories: Case, Petal-type Hood (LH850-02), Hood Adapter, Tripo
Aperture (f)	2.80 - 32.00	2.80 - 22.00
Magnification Ratio (x)	0.19	0.13
Filter Size (mm)	77	77
Diaphragm Blades	-	9
Type	Telephoto Zoom	Telephoto Zoom
APS Equivalent	120 - 300mm	1.5x: 105 - 300mm; 1.6x: 112 - 320mm
Lens Construction	16 elements in 13 groups, including 1 ED element	22 elements in 17 groups, including 3 SLD and 2 FLD elements
Image Circle	35mm	35mm
Focal Length (mm)	80.00 - 200.00	70.00 - 200.00
Brand	Pentax	Sigma
Name	Pentax SMC P-FA 80-200mm f/2.8 ED IF	Sigma 70-200mm ƒ/2.8 EX DG OS HSM APO
Weight (g)	1571	1430
Zoom System	Rotary	Rotary with lock; Internal
Focus Details	Internal	Internal; HSM with full-time manual override
Diameter (mm)	86.4	86.4
Length (mm)	191	197.6
Diaphragm Blades Type	-	rounded
Closest Focus (m)	1.4	1.4