Comparison of Olympus 50-200mm f/2.8-3.5 Zuiko Digital and Tokina 50-135mm f/2.8 AT-X 535 AF PRO DX

Attribute	Olympus 50-200mm f/2.8-3.5 Zuiko Digital ×	Tokina 50-135mm f/2.8 AT-X 535 AF PRO DX ×
Zoom System	Rotary	Rotary
Aperture (f)	2.80 - 22.00	2.80 - 32.00
Diagonal Angle of View (degree)	6.00 - 24.00	11.13 - 31.05
Filter Size (mm)	67	67
Notes	Includes Lens Hood (LH-70B) and Lens Case (LSH-1220); Compatible with TC-14 Teleconverter and EX-25 Extension Tube	BH-671 Lens Hood; Available AF Mounts: Canon and Nikon Digital Only
Focus Details	-	One-touch focus clutch mechanism
Type	Telephoto Zoom	Telephoto Zoom
Diaphragm Blades	7	9
Lens Construction	16 elements in 15 groups, including 3 ED elements	18 elements in 14 groups, including one SD glass element
Image Circle	Image Circle	APS-C
Focal Length (mm)	50.00 - 200.00	50.00 - 135.00
Brand	Olympus	Tokina
Name	Olympus 50-200mm f/2.8-3.5 Zuiko Digital	Tokina 50-135mm f/2.8 AT-X 535 AF PRO DX
Weight (g)	1070	845
Diameter (mm)	87	78.2
Length (mm)	157	135.2
35mm Equivalent	100 - 400mm	-
Magnification Ratio (x)	0.21	0.17
APS Equivalent	-	1.5x: 75 - 202.5mm; 1.6x: 80 - 216mm
Closest Focus (m)	1.2	1