The Rolleiflex 6000 System is a line of medium format single lens reflex cameras made by Rollei, in regular production starting from 1983 with the 6006.

The 6006 was derived from the earlier SLX (1976) and retains compatibility with its lenses and accessories, adding an interchangeable film back with an integral dark slide.

Broadly, the 6000 System can be divided into two distinct generations: the 6006/6002, which bear some similarities to the preceding SLX, and the 6008/6003/6001, which introduced upgraded metering and shutters.

The first camera released was the 6006 (1984), which had features similar to the SLX, adding through-the-lens (TTL) off-the-film (OTF) flash metering and a fully-interchangeable film back.

[1] The film back introduced with the 6006 had an integrated, flexible dark slide; it adds approximately 3⁄4 in (19 mm) to the depth of the 6006, compared to the SLX.

An updated 6008 (branded 6008 professional SRC1000) was released in 1993, which added compatibility with PQS lenses; these feature an increased shutter speed of 1⁄1000 sec.

[6] The original 6008/6003 models were replaced with the 6008 integral (1995), 6003 professional (1996), and 6008 E (1997); improvements included the addition of a multi-spot metering mode and a faster motor drive.

[5] Rollei released the X-Act2 in 2008, which is a monorail view camera with a full range of rise/fall, shift, and swing movements for both the lens (front) and film (rear) standards.

Like the Rolleiflex TLR, SL66, and SLX, the 6000 series uses 120 or 220 rollfilm to produce frames of up to 6×6 cm (nominal); the actual image size is based on imperial units, measuring 2+1⁄4×2+1⁄4 in (57×57 mm).

[11]: 5 Like the SLX, all 6000 System cameras have manual ambient light metering and shutter-priority autoexposure capability, along with motorized film advance and shutter charging.

[4]: 10  The 6008 and 6003 add aperture-priority and program autoexposure modes; in addition, the metering pattern can be switched between centre-weighted multi-zone and spot, covering approximately 1% of the overall image area.

[4]: 13 [12]: 11 Two separate electronic shutter releases are provided on the bottom front corners of the camera, which may be operated by the photographer's right or left hand.

[15] The 6000 System uses the same viewfinders as the preceding SLX; the standard viewfinder fitted has a folding waist-level finder with a built-in magnifier and a ground glass focusing screen with a central split-image rangefinder spot surrounded by a microprism collar, grid lines etched at regular intervals, and an integrated Fresnel lens.

[15] Other available viewfinders include: The screen could be changed to one of several alternatives, which are shared with the SL66:[16]: 524 Rollei offered the ME-1 multi-exposure control unit using the 14-pin DIN connector first released with the SLX; it allows the photographer to record up to ten images on a single frame, at a selectable interval between 0.1 and 1.5 seconds.