Leica m4

• Changed the shape of the top cover (without stamping ).
• Automatic self-resetting frame counter (like on Leica M3 ).
• The shape of the cocking cock of the shutter, the shift knob of the frame-limiting frame, the lever for turning on the rewind of the film, the self-timer lever is changed.
• Viewfinder eyepiece magnification 0.72 ^× . Frame -limiting frames (with parallax compensation) for lenses with a focal length of 35, 50 and 90 mm are visible in the viewfinder's field of view. A frame for a lens with a focal length of 135 mm has been added.
• Instead of frosted glass, the Fresnel lens (as on the Leica M3 ) is used in the backlight of the frame-limiting frames.

• The type of photographic material used is film type 135 .
• Frame size 24 × 36 mm.
• The case is metal, with a removable bottom cover and an opening panel on the back wall.
• Trigger cocking shutter and film rewind. The trigger has two positions: transport and working.
• Rewind film tape head type roulette.
• Lens mount - Leica M mount .
  • The device could be equipped at the request of the buyer with lenses of various models, it was possible to sell without a lens ( body ) .
• The viewfinder is combined with the rangefinder, the base of the rangefinder is 65 mm.
• In the viewfinder's field of view, switchable frame-limiting frames for interchangeable lenses are visible. Frames for telephoto lenses appeared either automatically or manually; there was a switch on the front of the camera. Automatic frame switching was determined by the design of the Leica M mount . Adapters for interchangeable lenses, in turn, were produced for M39 optics with different focal lengths. ^[2]
• The photographic shutter is focal with fabric curtains, with horizontal movement of the curtains.
• Shutter speeds from 1 to 1/1000 s and " B ", "non-rotating" shutter speed.
• Synchronization exposure - 1/50 s, cable sync contact "X" and "M".
• Clip for attaching flash units and interchangeable viewfinders.
• Mechanical self - timer (not available on Leica M4-2 and Leica M4-P).

The Leica M4 camera was produced from 1968 to 1971 . Production ceased in favor of the Leica M5 camera (since 1971 ). However, the larger and more expensive fifth model was coolly received by customers and the manufacturer's expectations did not meet. In 1975 (the anniversary of Leica Camera ), production of the fourth model was resumed.

In 1977, the release of the Leica M4-2 model was launched. Main differences: central sync contact , lack of a self - timer , compatibility with motor consoles for Leica M3 and Leica M2 cameras, and cheaper production technology.

In 1981, the Leica M4-P appeared , in the viewfinder of which there were additional frame-limiting frames for interchangeable optics with a focal length of 28 and 75 mm.

In 1984, the fourth model was replaced by the Leica M6 , in fact it was the Leica M4-P with a semi-automatic exposure setting ( TTL - exposure meter ).

• The Leica MDa and Leica MD-2 cameras are simplified modifications without a rangefinder and viewfinder , intended for use as a photographic recorder or in conjunction with the Leica Visoflex single-lens reflex unit .

• Leica M Serial Numbers at Cameraquest.com
• Cameraquest: Leica M Guide