The Olympus IS-1000 (aka L-1000) is an autofocus 35mm single lens reflex camera with built-in 4× zoom lens. It was the first in Olympus' iS series of so-called 'Zoom Lens Reflex' cameras. The lens is a multi-coated 35-135mm f4.5/5.6 lens with 16 elements in 12 groups. The autofocus is a passive CCD line sensor. Manual focusing is possible by means of electronic buttons. The camera has a built-in flash, and of course a variety of flash and other shooting programs. Exposure is controlled electronically by a sensor behind a half-transparent mirror of the viewfinder system. With its size 117x90x153mm (closed) and its weight of 875g it is a reasonably compact construction.