The new LUMIX G 20 mm / F1.7 ASPH. features a dramatic compactness and light weight despite its F1.7 brightness allowing a beautiful soft focus for photos to be even more impressive. 
Comprising of seven lenses in five groups, the new lens system uses two aspherical lenses most effectively to minimize both distortion and chromatic aberrations, achieving super high resolution corner to corner. The versatile 20 mm of focal distance (Equivalent to 40 mm on a 35 mm film camera) is suitable for wide variety of occasions from daily snapshots including sceneries like sunsets and dimly lit indoor shots to the deliberately creative shots taking advantage of its beautiful soft focus. When mounted on the LUMIX G Micro System Cameras, the LUMIX G 20 mm / F1.7 ASPH. allows use of the advanced contrast AF system, which includes a Face Recognition function, for more convenient, more enjoyable shooting. Seven blades give the aperture a rounded shape that produces an attractively smooth effect in out-of-focus areas when shooting at larger aperture settings. The new LUMIX G 20 mm / F1.7 ASPH. lens also features a highly reliable metal mount, and uses multi-coated lens elements that minimize ghosts and flare to further enhance its optical performance.
Specifications:
Focal length: 20 mm
35mm equivalent focal length: 40 mm
Diagonal Angle of view: 57°
Maximum aperture: F1.7
Minimum aperture: F16
Lens Construction: • 7 elements/5 groups • 2 aspherical elements
Number of diaphragm blades: 7, Circular aperture diaphragm
Minimum focus: 0.2m / 0.66ft
Maximum magnification: Approx. 0.13x / 0.25x
Image stabilization: No Filter thread: 46mm
Supplied accessories: • Front and rear caps • Lens Case
Weight: 100 g (3.53 oz)
Dimensions: 63mm diameter x 25.5mm (2.48 x 1.00 in)
Lens Mount: Micro Four Thirds