Panasonic Lumix G 20mm F1.7 ASPH Specification Review

The Panasonic Lumix G 20mm F1.7 ASPH was declared recently as the natural partner to the light and convenient Lumix DMC-GF1 Small Four Thirds electronic camera, together with a Leica-branded 45mm F2.8 Macro (the electronic camera is also available with a 14-45mm kit zoom). The H-H020, as Panasonic surprisingly prefers to call it, is a large highest possible aperture ‘normal’ primary in a very light and convenient ‘pancake’-type body. It accumulates a stop and a half more mild than Olympus’s M. Zuiko Digital 17mm F2.8 hot cake (which is only partially smaller), and is therefore sure to be of interest to E-P1 entrepreneurs who want to capture in low mild using a lens well-matched to that electronic camera’s size.

Panasonic Lumix G 20mm F1.7 ASPH Review
Panasonic Lumix G 20mm F1.7 ASPH Review

There’s a 7-bladed aperture program, using rounded rotor blades meant to give a nice-looking, sleek impact to out-of-focus features. Rounding off the specifications is a lowest concentrate range of just 20cm. However it’s important to note, that compared with many of Pansonic’s contacts, this doesn’t have built-in visual picture stabilisation. Let’s see if the pancake’s picture great quality can live up to such substantial desires.

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Panasonic Lumix G 20mm Headline Features

  • 20mm ‘perfect normal’ set central length; quick F1.7 highest possible aperture
  • Ultra-thin, light and convenient style
  • ‘Focus by wire’ guide concentrate system
  • Micro Four Thirds install for Panasonic Lumix G and Olympus Pen systems

Panasonic Lumix G 20mm Design and Operation

The small 20mm F1.7 isn’t the actual lens currently on the market (the Olympus M. Zuiko Electronic 17mm F2.8 Hot cake shaves a couple of mm off in each dimension), but it’s uncommonly fast for such a lightweight style, allowing in a quit. 5 more light than the above-mentioned 17mm (or Olympus’s Four Thirds-mount Zuiko Electronic 25mm F2.8). Development is reassuringly strong, with top quality complete and a steel install. The weight is just 100g.

Panasonic Lumix G 20mm F1.7 ASPH Body
Panasonic Lumix G 20mm F1.7 ASPH Body

Design-wise there’s nothing much to see – the guide concentrate band consumes the great majority of the lens gun barrel, and the whole visual device goes back and sends to concentrate, with just 3mm journey between extreme conditions. Especially there’s no bayonet install for a bonnet, presumably to help keep dimension as low as possible.

Lens whole body elements

  • The lens functions the Small Four Thirds install, currently suitable with cameras from Olympus and Panasonic. Interaction with you is all-electronic, via the gold-plated connections. The lens installs by aiming the red dot to that on the camera’s install, and spinning clockwise to secure.
  • The only exterior management is the guide concentrate band, which is a relatively nice 10mm extensive, and incredibly sleek and well-damped. There’s no area for a range range, so you can’t use hyperfocal concentrating techniques. The lens concentrates by shifting the whole visual set up, with an optimum improve in duration of merely a 3mm.

Panasonic Lumix G 20mm Test Results

The Panasonic 20mm F1.7 hot cake does rather well in our studio room assessments. As opposed to Olympus M Zuiko Digital 17mm F2.8, the Panasonic basically stands out – it’s much clearer (to the level of being better at F1.7 than the Olympus is at F2.8), and has reduced CA (even before application correction), less falloff and reduced distortion (both ‘native’ and corrected). Overall breathtaking outcomes for a lens this little.


Sharpness outcomes are incredibly good; the lens is very distinct in the middle even set up, and while the sides are somewhat smooth at F1.7, they improve up quickly on avoiding down. avoiding down further recognizes sharpness gradually drop due to diffraction (mercifully Panasonic does not offer apertures more compact compared to F16).


We consider falloff to begin with becoming a prospective issue when the area lighting drops to more than 1 quit below the middle. We evaluate 1.7 prevents falloff set up, which vanishes on avoiding down to around F2.8 – this is unlikely to be recognizable in regular use.

Macro Focus

The 20mm does as well as to expect given its area of perspective. Highest possible zoom is 0.14x, obtained at a calculated nearest concentrate of 18cm and a functional range of about 13cm from the top side factor to the topic. Center sharpness is very good start up, although obviously the sides are smooth. Quit down to F4, though, and our flat-field graph analyze is distinct right across the structure.

Bokeh Quality

One truly suitable, but difficult to evaluate component of a lens’s efficiency is the ability to provide efficiently blurry out-of-focus areas when trying to separate a topic from the qualifications, generally when using a long central length and large aperture.

Panasonic Lumix G 20mm ISO 100 Bokeh Quality
Panasonic Lumix G 20mm ISO 100 Bokeh Quality Photo By Azis Photography

Chromatic aberration

Lateral chromatic aberration is instantly fixed when the lens is used on Panasonic systems, but Olympus E-P1 entrepreneurs won’t get this benefit, regardless of whether they use out-of-camera jpegs or raw alterations (at least from Olympus Expert or Adobe Digicam Raw / Lightroom. This isn’t actually a catastrophe – the 20mm F1.7 is unseen particularly undesirable levels of fringing anyway. There’s a filter natural / natural edge, with a yellow-colored / red one increasing beyond that.


The 20mm F1.7, despite its fast highest possible aperture, performs exceptionally well in its managing of surface. It’s possible to capture straight into the sun with little ill-effect, and during prolonged use in shiny delayed summer time sun we saw little proof for any pictures being negatively impacted by surface, no issue how hard we tried to pressure the lens.

Panasonic Lumix G 20mm Flare
Panasonic Lumix G 20mm Flare Photo By Azis Photography

Panasonic Lumix G 20mm Specifications

Price • US: $400
• UK: £300
Manufacturer’s product code H-H020
Date introduced September 2009
Maximum format size Micro Four Thirds
Focal length 20mm
35mm equivalent focal length 40mm
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, rounded
Minimum focus 0.2m / 0.66ft
Maximum magnification Approx 0.13x
AF motor type DC Micro motor
Focus method Unit focus
Image stabilization No
Filter thread • 46mm
• Does not rotate on focus
Supplied accessories* • Front and rear caps
• Lens case
Weight 100g (3.5 oz)
Dimensions 63mm diameter x 25.5mm length
(2.5 x 1.0 in)
Lens Mount Micro Four Thirds