Type: 35 mm single-lens reflex with aperture preferred automatic exposure.
Image size: 24 x 36 mm.
Lens mount: Contax/Yashica large-diameter bayonet mount.
Shutter: Electronically controlled vertical-running, all-metal focal plane shutter.
Shutter speeds: Quartz-timed electronically-controlled shutter with speeds semi-continuously variable on AUTO from 1/1000 to 1 seconds. Manual shutter speeds from 1/1000 sec. to 1 sec., plus X (1/100 sec.) and "B" Synchro contact: X contact (1/100 sec.).
Auto flash control: When used with CS-201 Auto Flash Unit, shutter speed automatically set at 1/100 sec. upon full charging of the flash unit.
Self-timer: Quartz-timed electronic self-timer with 10 sec. delay. LED flashes and audible warning device sounds during operation, simultaneously accelerating 2 sec. before shutter release.
Shutter release: Electromagnetic release system; auxiliary remote release via "Release socket".
Exposure control: Through-the-lens (TTL), center-weighted metering at full aperture using SPD (Silicon Photo Diode) cell. Aperture-preferred automatic exposure (LED matching type on Manual). EV 1 to EV 18 sensitivity range at ASA 100 with f/1.4 lens. ASA range 25-1600.
Exposure check button: Pressing button activates LED indicators for ten sec.
AE lock: Setting AE lock lever locks in shutter speed in effect at time of setting.
Exposure compensation: + 2 EV (Doubles as film speed dial).
Viewfinder: Fixed eye-level pentaprism type; field shows 95% of picture area; 0.86 magnification (with 50 mm lens)
Focusing screen: Horizontal split-image spot, surrounded by a microprism collar and an outer matte field.
Viewfinder display: Shutter speeds indicated by 16-indicator LEDs (correct exposure on AUTO; exposure selected on Manuals; over- and under-exposure indications; special mark shows when flash is fully charged; battery check warning.
Film advance: With rapid advance lever; 130° setting angle; 20° standoff position.
Winder: Accepts Contax 139 Winder II.
Film rewind: Film rewind crank and film rewind release button (automatic resetting type).
Exposure counter: Automatic resetting type.
Accessory shoe: Direct X contact, and terminal for coupling CS-201 Auto Flash Unit.
Camera back: Opens by lifting film rewind knob; with memo holder.
Power source: Two 1.5 V silver-oxide batteries (Eveready S76, Ucar S76, Mallory MS-76 or equivalent); or alkaline-manganese batteries (LR44 or equivalent).
Battery check: Indicated via lighting or flashing of LEDs inside the viewfinder.
Dimensions: 135 x 86 x 50 mm.
Weight: 460 grams with batteries.