Comparison of Tamron 70-200mm f/2.8 Di LD IF Macro SP AF and Tokina 70-200mm f/4 AT-X AF PRO FX VCM-S SD

Attribute	Tamron 70-200mm f/2.8 Di LD IF Macro SP AF ×	Tokina 70-200mm f/4 AT-X AF PRO FX VCM-S SD ×
Filter Size (mm)	77	67
Notes	Available mounts: Canon, Nikon, Pentax, Sony; Included accessories: Petal-shaped lens hood	Optical Image Stabilization (3-stops); Available AF Mounts: Nikon; Included Accessories: Lens hood; Tripod collar optional
Closest Focus (m)	0.95	1
Magnification Ratio (x)	0.32	0.28
Type	Telephoto Zoom	Telephoto Zoom
Length (mm)	194.3	168
APS Equivalent	1.5x: 105 - 300mm; 1.6x: 112 - 320mm	1.5x: 105 - 300mm; 1.6x: 112 - 320mm
Zoom System	Rotary	Rotary
Image Circle	35mm	35mm
Focal Length (mm)	70.00 - 200.00	70.00 - 200.00
Brand	Tamron	Tokina
Name	Tamron 70-200mm f/2.8 Di LD IF Macro SP AF	Tokina 70-200mm f/4 AT-X AF PRO FX VCM-S SD
Weight (g)	1100	980
Aperture (f)	2.80 - 32.00	4.00 - 32.00
Diaphragm Blades	9	9
Diagonal Angle of View (degree)	12.30 - 34.30	12.70 - 34.80
Lens Construction	18 elements in 13 groups, including 3 LD (low dispersion) elements	19 elements in 14 groups, including 3 SD elements
Diameter (mm)	89.5	82
Focus Details	Internal Focusing; One-touch AF/MF Switchover mechanism (for Canon and Nikon only)	Internal with ultrasonic motor