The Four Thirds system is a new open standard for digital SLR cameras with interchangeable lenses that utilise a 4/3 inch image sensor. In addition to facilitating the development of camera lens systems specifically designed to maximise digital image sensor performance - without being bound by the design conventions imposed by 35mm film camera SLR systems - the Four Thirds system establishes a common standard for lens mounts, ensuring compatibility between lenses and bodies even if they are produced by different manufacturers. Furthermore, the Four Thirds system interchangeable lenses are much smaller and lighter than 35mm and APS SLR lens systems.
The Four Thirds system is a new open standard for digital SLR cameras with interchangeable lenses that utilise a 4/3 inch image sensor.
The interchangeable lenses, developed and manufactured by Olympus, are exceptionally bright and compact, and deliver high quality images that only digital lenses can provide. The new Olympus lenses are (figures in parentheses indicate 35mm film camera equivalent):
300mm, f2.8 (600mm)
14 - 54mm, f2.8 - f3.5 zoom (28 - 108mm)
50mm, f2.0 macro (100mm)
50 - 200mm, f2.8 - f3.5 zoom (100 - 400mm)