Comparison of Panasonic 14-50mm f/3.8-5.6 ASPH Leica D VARIO-ELMAR and Tamron SP AF 17-50mm f/2.8 XR Di II LD Aspherical IF

Attribute	Panasonic 14-50mm f/3.8-5.6 ASPH Leica D VARIO-ELMAR ×	Tamron SP AF 17-50mm f/2.8 XR Di II LD Aspherical IF ×
Diagonal Angle of View (degree)	24.00 - 75.00	31.20 - 78.80
Notes	Additional features: Mega O.I.S. Image Stabilization; Included Accessories: Lens Hood, Lens Caps, Storage Bag	Available AF mounts: Canon, Konica Minolta, Nikon, Pentax; Includes petal type lens hood.
Aperture (f)	3.80 - 22.00	2.80 - 32.00
Magnification Ratio (x)	0.42	0.22
Filter Size (mm)	67	67
35mm Equivalent	28 - 100mm	-
Type	Standard Zoom	Standard Zoom
Diaphragm Blades	7	7
Lens Construction	15 elements in 11 groups, including 2 aspherical and 2 ED elements	16 elements in 13 groups, including Low Dispersion and Aspherical elements
Image Circle	Four-Thirds	Image Circle
Focal Length (mm)	14.00 - 50.00	17.00 - 50.00
Brand	Panasonic	Tamron
Name	Panasonic 14-50mm f/3.8-5.6 ASPH Leica D VARIO-ELMAR	Tamron SP AF 17-50mm f/2.8 XR Di II LD Aspherical IF
Weight (g)	434	398
Zoom System	Rotary	Rotary
Focus Details	Internal	Internal
Diameter (mm)	75	74
Length (mm)	93.3	81.7
APS Equivalent	-	1.5x: 25.5 - 75mm; 1.6x: 27.2 - 80mm
Closest Focus (m)	0.29	0.27