The camera employs a side-swing mirror for a more compact design. It is light-weight, at around the same size and weight as a high-end compact such as the Olympus C-8080, but with the advantage of interchangeable lenses.
The E-300 will come complete with a 14-45mm, f3.5-5.6 Zuiko digital zoom, equivalent to 28-90mm in 35mm format. A range of other lenses is available, as well as TTL flashes.
The camera will take images up to 3,264-x-2,448 in RAW, JPEG or TIFF format. Its sensitivity range is ISO 100 to 1600. Exposure modes available are program, manual, aperture-priority, shutter-priority and scene. Metering modes available are evaluative, centre-weighted and spot.
The camera also includes AE lock, AE bracketing, exposure compensation, ten white balance settings plus custom, white balance bracketing and a shutter speed range of 2-1/4000sec. It supports sRGB and Adobe RGB colour space and will shoot at 2.5fps.