Comparison of Olympus 12-60mm ƒ/2.8-4 SWD Zuiko Digital ED and Tamron SP AF 17-50mm ƒ/2.8 XR Di II VC LD Aspherical IF

Attribute	Olympus 12-60mm ƒ/2.8-4 SWD Zuiko Digital ED ×	Tamron SP AF 17-50mm ƒ/2.8 XR Di II VC LD Aspherical IF ×
Aperture (f)	2.80 - 22.00	2.80 - 32.00
Diaphragm Blades Type	circular	rounded
Filter Size (mm)	72	72
Notes	Dust and drip proof. Includes Lens Hood (LH-75B) and Lens Case (LC-72B)	Vibration Compensation (VC) Image Stabilization; Available AF mounts: Canon, Nikon; Includes petal type lens hood.
Focus Details	-	Internal, with built-in focus motor
Type	Standard Zoom	Standard Zoom
Diaphragm Blades	7	7
Diameter (mm)	79.5	79.6
Image Circle	Image Circle	Image Circle
Focal Length (mm)	12.00 - 60.00	17.00 - 50.00
Brand	Olympus	Tamron
Name	Olympus 12-60mm ƒ/2.8-4 SWD Zuiko Digital ED	Tamron SP AF 17-50mm ƒ/2.8 XR Di II VC LD Aspherical IF
Weight (g)	575	570
Diagonal Angle of View (degree)	20.00 - 84.00	31.20 - 78.80
Lens Construction	14 elements in 10 groups, including 1 Super ED, 2 ED, 1 Aspherical ED and 2 Aspherical elements	19 elements in 14 groups, including Low Dispersion and Aspherical elements
Zoom System	Rotary	Rotary
Closest Focus (m)	0.25	0.29
35mm Equivalent	24 - 120mm	-
Length (mm)	98.5	94.5
APS Equivalent	-	1.5x: 25.5 - 75mm; 1.6x: 27.2 - 80mm
Magnification Ratio (x)	0.28	0.21