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2 lenses compared
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66%
Jul 11, 2013
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
F8.0
F16.0
F8.0
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 mm
 
does not rotate on focus
 
No
 
No