Panasonic LUMIX G 20mm F/1.7 II ASPH

Specifications01

MountMICRO 4/3

Focal length20mm

Max aperturef/1.7

TypeCinema · Macro · Wide · Prime

Release year2013

Weight87 g

Filter size46 mm

Physical length63 mm

Min focus distance0.2 m

Aperture blades7

Optical elements7

Groups5

Min aperturef/16

AutofocusNo

StabilizationNo

Lens hoodbarrel-shaped, optional

Sensor coverageMicro Four Thirds

Additional Info02

SpecialII ASPH

Category["Micro-Four-Thirds"]

Keywords["Micro-Four-Thirds","Panasonic","Prime","Standard"]

Lens TypePrime lens

Review AuthorKlaus

Review Rating7.5

Equiv Aperturef/3.4 (full format equivalent, in terms of depth-of-field)

Review VerdictThe Panasonic Lumix G 20mm f/1.7 ASPH II is an interesting little being. The center image quality is nothing short of phenomenal. The borders are slightly worse but still pretty good and that's straight from f/1.7. The amount of vignetting is a bit on the high side at large apertures and you need to stop down a few stops to resolve the issue. Distortions and lateral CAs are very well controlled and not field relevant - when auto-corrected. The quality of bokeh is about average - the critical focus transitions zones can be a little rough if there're difficult structures here. The build quality of lens is excellent and we'd certainly like to see more of this in future lenses. The focus-by-wire approach (manual focusing) may be odd at first but you should be able to used to it in no time. The AF performance is very good. We had much fun with the lens out there and it's very reasonably priced for what it is.

Review Criteria{"Build Quality":7.5,"Optical Quality":7.5,"Price / Performance":9}

Review Published2014-01-06T12:35:00+00:00

Equiv Focal Length40 mm (full format equivalent)

Optical Construction7 Elements in 5 Groups (2x aspherical elements)

Summary02

Panasonic LUMIX Micro Four Thirds 20mm prime lens with a maximum aperture of f/1.7, designed for general photography and low-light use. It’s a fixed focal-length lens for an ~40mm equivalent field of view.

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Specifications from opticallimits

Where can this lens be adapted?

The Micro Four Thirds mount has a flange distance of 19.25 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work

Native lenses set the aperture, and often the focus, electronically. On a plain adapter they do not work. Use an electronic adapter made for this pair; for many pairs nobody makes one. Fully manual lenses are the exception.

Nikon ZAdapter · 3.25 mm
Covers Four Thirds: it can vignette on a full-frame sensor.
Fujifilm XAdapter · 1.55 mm
Covers Four Thirds: it can vignette on a APS-C sensor.
Micro Four ThirdsNative

No plain adapter reaches infinity focus on: Sony E, Canon RF, L-Mount, Fujifilm G (GFX), Canon EF-M, Canon EF, Nikon F.