Available lenses for the Four Thirds standard digital camera system.

Four thirds system

The Four Thirds system was created to standardize a new generation of digital cameras. Sigma Corporation as well as several other companies are participating in this system.

This new standard will define the lens mount size, distance from the image sensor and lens-camera communication. The sensor size and aspect ratio (18x13.4mm / 4:3) will also be standardized.

Four Thirds Cameras

Olympus : E-300, E-330, E-1, E-400, E-410, E-500, E-510 
Panasonic: Lumix DMC-L1

Leica: Digilux 3

Sigma Four Thirds Lenses

24mm f1.8 EX DG Macro

30mm f1.4 EX DC

105mm f2.8 EX DG Macro

150mm f2.8 EX DG Macro

18-50mm f3.5-5.6 DC

18-50mm f2.8 EX DC Macro

55-200mm f4-5.6 DC

135-400mm f4.5-5.6

50-500mm f4-6.3 EX DG

300-800mm f5.6 EX DG

For more info on the Four Thirds system: http://www.four-thirds.org/en/