Comparison of Pentax SMC P-FA 80-200mm f/2.8 ED IF and Tamron 70-200mm f/2.8 Di VC USD G2 SP (Model A025)

Attribute	Pentax SMC P-FA 80-200mm f/2.8 ED IF ×	Tamron 70-200mm f/2.8 Di VC USD G2 SP (Model A025) ×
Diagonal Angle of View (degree)	12.50 - 30.50	12.30 - 34.30
Notes	Included Accessories: Lens Hood	Moisture-Proof and Dust-Resistant Construction; Image Stabilized (CIPA rated to 5-stops); Available mounts: Canon EF, Nikon F
Aperture (f)	2.80 - 32.00	2.80 - 22.00
Magnification Ratio (x)	0.19	0.16
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	23 elements in 17 groups, including 1 XLD (Extra Low Dispersion) and 5 LD (Low Dispersion) elements; eBAND Coating; Fluorine Coating
Image Circle	35mm	35mm
Focal Length (mm)	80.00 - 200.00	70.00 - 200.00
Brand	Pentax	Tamron
Name	Pentax SMC P-FA 80-200mm f/2.8 ED IF	Tamron 70-200mm f/2.8 Di VC USD G2 SP (Model A025)
Weight (g)	1571	1500
Zoom System	Rotary	Rotary
Focus Details	Internal	Internal using USD (Ultrasonic Silent Drive) motor with continuous manual focus mechanism; AF/MF switch; AF limiter switch
Diameter (mm)	86.4	88
Length (mm)	191	193.8
Diaphragm Blades Type	-	rounded
Closest Focus (m)	1.4	0.95