Comparison of Tamron SP AF 28-105mm f/2.8 LD Aspherical IF and Tokina 28-80mm f/2.8 AT-X 280 AF PRO

Attribute	Tamron SP AF 28-105mm f/2.8 LD Aspherical IF ×	Tokina 28-80mm f/2.8 AT-X 280 AF PRO ×
Filter Size (mm)	82	77
Notes	Available AF Mounts: Canon, Minolta, Nikon; Included Accessories: Lens Hood, Case	Available AF Mounts: Canon, Minolta, Nikon, Pentax; Included Accessories: Lens Hood, Fitted Soft Case
Closest Focus (m)	0.5	0.5
Magnification Ratio (x)	0.21	0.2
Type	Standard Zoom	Standard Zoom
Length (mm)	112	120
APS Equivalent	1.5x: 42 - 157.5mm; 1.6x: 44.8 - 168mm	1.5x: 42 - 120mm; 1.6x: 44.8 - 128mm
Zoom System	Rotary with "Anti-Slip Mode"	Rotary
Image Circle	35mm	35mm
Focal Length (mm)	28.00 - 105.00	28.00 - 80.00
Brand	Tamron	Tokina
Name	Tamron SP AF 28-105mm f/2.8 LD Aspherical IF	Tokina 28-80mm f/2.8 AT-X 280 AF PRO
Weight (g)	880	819
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Diaphragm Blades	9	9
Diagonal Angle of View (degree)	24.00 - 75.00	30.30 - 75.30
Lens Construction	15 elements in 13 groups, including 4 aspherical and 3 LD elements	16 elements in 12 groups, including 2 aspherical and 1 SD elements
Diameter (mm)	87	84
Focus Details	Internal	Internal with Focus Clutch mechanism