Celebrating Micro Four Thirds

Angela Nicholson looks back over the first year of the Micro Four Thirds camera system, which promises to revolutionise photography...

It is difficult to overstate the impact that the announcement of the Panasonic G system of Micro Four Thirds cameras had on the photographic world in September 2008. At the photokina trade show in Cologne, Germany, that month, the talk was of little else, and it seemed every manufacturer was either considering something similar or had a camera that would meet the challenge raised by the first model, the Panasonic Lumix DMC-G1.

The reason for the excitement was that the G1 is a lot smaller than most DSLRs, yet it has a DSLR-style shape and controls, accepts interchangeable lenses and has a Four Thirds-sized sensor. This sensor is bigger than the devices in most comparably sized bridge and compact cameras, and excluding the mirror that is found in SLRs has enabled Micro Four Thirds cameras to be made significantly smaller.

The Panasonic Lumix G1

A new approach

Before the G series was launched, Panasonic was keen to enter the DSLR market. The company knew it was late to join the party and wasn’t especially well known to enthusiasts, so it needed to create an impact. Its first attempt, the Leica inspired Panasonic Lumix DMC-L1, was loved by a few because of its traditional controls (including an aperture ring), but many were unimpressed by its bulk and rectangular design. While the more ‘conventional’ Lumix DMC-L10 had Live View with contrast-detection AF and an articulated screen, it too had few fans.

Panasonic went back to the drawing board. Although Olympus did this to an extent when devising the original Four Thirds standard and looking for the optimal relationship in size between the sensor and lens mount, the company’s overall camera design followed traditional principles using an SLR layout with a reflex mirror. Panasonic used its expertise in compact digital stills and video camera production to help develop a completely new type of digital camera.

The Panasonic Lumix GH1

While the Micro Four Thirds system is built around a Four Thirds-sized sensor, the cameras have no reflex mirror and this enables the distance from the lens flange to the sensor to be halved (40mm to 20mm). The lack of a mirror also means that the rear element of the lens can be recessed further into the camera, and thus closer to the sensor. This, plus the 6mm reduction in the diameter of the lens mount, enables the overall size of the optics to be significantly decreased in comparison with standard Four Thirds or 35mm lenses. In addition, the Micro Four Thirds lens mount has 11 contacts – two more than the Four Thirds mount. These extra pins help speed communication between camera and lens, reducing time lags and boosting the Live View video-recording performance.

A system evolves

Since the Panasonic Lumix DMC-G1 was launched along with the Lumix G Vario 14-45mm f/3.5-5.6 Asph Mega OIS and Lumix G Vario 45-200mm f/4-5.6 Mega OIS lenses, three more cameras and six more optics have been introduced. The first camera, the Panasonic Lumix DMC-GH1, is similar to the G1 but with HD video. Panasonic also introduced the Lumix Vario HD 14-140mm f/4-5.8 Asph Mega OIS lens. This is the first in a new line of HD lenses that are designed to complement the camera’s video capability.

The Olympus E-P1 Pen

Although Panasonic hinted that it would produce a Micro Four Thirds camera with compact camera styling when the G1 was launched, it was Olympus that brought us the first such camera, the Pen E-P1. Olympus based its design on its popular Pen, and the Pen E-P1 won admirers thanks to its retro styling, small size and sensor-based image stabilization. A slim, collapsible M Zuiko Digital ED 14-42mm f/3.5-5.6 and slim M Zuiko Digital 17mm f/2.8 pancake kit lens options are also popular.

Just weeks after the arrival of Olympus’s first Micro Four Thirds camera, Panasonic introduced its third, the Lumix DMC-GF1, which also has compact-camera-style features. This has fuelled a huge debate about which is the better option, with Olympus fans extolling the virtues of the E-P1’s built-in image stabilization and Panasonic fans citing the GF1’s built-in flash (the EP-1 lacks one) and its excellent detail resolution.

The Panasonic Lumix GF1

Available kit

While the Panasonic GH1 sensor is able to make use of more of the imaging circle of the lens, and has a greater number of photo sites, all Micro Four Thirds cameras are believed to use the same Live MOS sensor. Each camera has an effective pixel count of 12.1 million and lenses are subject to a 2x focal-length conversion factor.


Pen E-P1, M Zuiko Digital ED 14-42mm f/3.5-5.6, M Zuiko Digital 17mm f/2.8 pancake, FL-14 flashgun, VF-1 viewfinder for use with 17mm f/2.8 lens, MMF-1 Four Thirds lens to Micro Four Thirds adapter, MMF-2 Olympus OM lens to Micro Four
Thirds adapter, CS-10B body jacket


Lumix DMC-G1, DMC-GH1, DMC-GF1, G Vario 7-14mm f/4 Asph, Lumix G Vario 14-45mm f/3.5-5.6 Asph Mega OIS, Vario HD 14-140mm f/4-5.8 Asph Mega OIS, Vario HD 45-200mm f/4-5.6 Mega OIS, G Vario 20mm f/1.7 Asph, Leica DG Macro-Elmarit 45mm f/2.8 Asph Mega OIS, DMW-LVF1E electronic viewfinder for GF1, DMW-MA1 Four Thirds lens to Micro Four Thirds adapter, DMW-MA2M Leica M lens to Micro Four Thirds adapter, DMW-MA3RE Leica R lens to Micro Four Thirds adapter

Lenses for 2010

Lumix G 100-300mm f/4-5.6 OIS,
G 8mm f/3.5 fisheye, G 14mm f/2.8.

05.08.08 Panasonic and Olympus announce the development of the Micro Four Thirds system
12.09.08 Panasonic announces the world’s 1st Micro Four Thirds system camera, the Lumix G1
22.09.08 Olympus announces Micro Four Thirds digital camera under development
14.02.09 Panasonic G system wins AP’s Technical Innovation of the Year Award
03.03.09 Panasonic introduces the Lumix DMC-GH1
16.06.09 Olympus introduces the Pen E-P1 Micro Four Thirds, the 1st interchangeable-lens system
15.08.09 Panasonic awarded European Multimedia Camera Award 2009-2010 by EISA for GH1
18.08.09 Olympus awarded European Camera Award 2009-2010 by EISA panel for Pen E-P1
02.09.09 Panasonic introduces the Lumix GF1

Read a range of camera reviews at www.amateurphotographer.co.uk

Since this article went to press, Olympus have announced and released two more models, the Olympus E-P2 and Olympus E-PL1