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2 lenses compared
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Sep 2, 2009
Sep 17, 2012
 
Prime lens
Prime lens
FourThirds
FourThirds
20 mm
15 mm
No
No
Micro Four Thirds
Micro Four Thirds
 
F1.7
F8
F16
F8
No
No
7
 
rounded blades
Fixed circular aperture
 
7
3
5
3
2 aspherical elements
 
 
0.20 m (7.87)
0.30 m (11.81)
0.13×
0.06×
Yes
No
Micromotor
 
Yes
N/A
Unit
Unit
No
No
No
No
 
100 g (0.22 lb)
22 g (0.05 lb)
63 mm (2.48)
56 mm (2.2)
26 mm (1)
9 mm (0.35)
46.0 mm
 
does not rotate on focus
 
No
 
No