Comparison of Panasonic 8-18mm f/2.8-4.0 ASPH LEICA DG VARIO-ELMARIT and Tamron SP AF 11-18mm f/4.5-5.6 Di II LD Aspherical IF

Attribute	Tamron SP AF 11-18mm f/4.5-5.6 Di II LD Aspherical IF ×	Panasonic 8-18mm f/2.8-4.0 ASPH LEICA DG VARIO-ELMARIT ×
Filter Size (mm)	77	67
Notes	Available mounts: Canon, Minolta, Nikon; Includes petal type lens hood.	Splash/Dust/Freezeproof; Included Accessories: Lens hood, lens caps
Length (mm)	78.6	88
Magnification Ratio (x)	0.13	0.12
Diameter (mm)	82.2	73.4
Closest Focus (m)	0.25	0.23
Focal Length (mm)	11.00 - 18.00	8.00 - 18.00
Diagonal Angle of View (degree)	75.00 - 103.00	62.00 - 107.00
Brand	Tamron	Panasonic
Image Circle	Image Circle	Micro Four-Thirds
Name	Tamron SP AF 11-18mm f/4.5-5.6 Di II LD Aspherical IF	Panasonic 8-18mm f/2.8-4.0 ASPH LEICA DG VARIO-ELMARIT
Weight (g)	355	315
Type	Wide Zoom	Wide Zoom
Aperture (f)	4.50 - 29.00	2.80 - 22.00
Diaphragm Blades	7	7
Diaphragm Blades Type	-	circular
Lens Construction	15 elements in 12 groups, including aspherical and low dispersion elements	15 elements in 10 groups, including 1 aspherical ED, 3 aspherical, 1 UHR and 2 ED elements
Zoom System	Rotary, telescoping	Rotary
Focus Details	Internal	Internal
APS Equivalent	1.5x: 16.5 - 27mm; 1.6x: 17.6 - 28.8mm	-
35mm Equivalent	-	16 - 36mm