Pre-IFA 2009: Panasonic has announced the LUMIX G 20mm F1.7 ASPH, a pancake type lens that has been designed to complement its latest GF1 Micro Four Thirds camera. With a 40mm-equivalant field of view, the lens measures just 25.5 mm (1 inch) in length and weighs only 100 grams. The optical design comprises seven elements in five groups, including two aspherical elements to minimize distortion and chromatic aberration.

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New Micro Four Thirds Digital Interchangeable Lens
LUMIX G 20mm / F1.7 ASPH.

A Compact and Lightweight Pancake with Outstanding Brightness

September 2: 2009: Panasonic unveiled a new pancake interchangeable lens called the LUMIX G 20mm / F1.7 ASPH. (35mm camera equivalent: 40mm) as a new member of the LUMIX G Micro System. The new LUMIX G 20mm / 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 5 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 20mm of focal distance(Equivalent to 40mm on a 35mm 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 20mm / 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 20mm / 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.

LUMIX G 20mm / F1.7 ASPH. lens 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


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