Yashica Mat 124G
posted 12-22-'02

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Type: Twin-lens reflex camera accepting either 120 412 exposures) or 220 124 exposuresl Film.

Lens: YASHINON 80 mat F3,5 lens composed of 4 elements in 3 groups.

Shutter: COPAL-SV shutter with speeds from 1 to 1/500 sec. and B. built-in self timer; MX flash synchronizer selector; shutter locking device.

Finder: YASHINON 80 mm F2.8 viewing lens; Fresnel field lens for corner to-corner brightness; 3X magnifying lens for critical focusing; eve-level sports-finder frame incorporated in the viewfinder hood.4www.butkus.org

Exposure meter: Built-in match-needle type CdS meter based on preselection of shutter speed; film speed range from ASA 25 to 400; meter switch coupled to viewfinder hood; operates on 1,3 V mercury battery.

Film advance: Crank-handle film advance with automatic film stop; simultaneously charges the shutter for the next exposure; automatic resetting exposure counter registers the number of exposed frames.

Focusing: Extra-large knob extends or retracts the front panel to secure focus on the subject; distance scale calibrated in both feet and meters (3.3 ft to infinity; 1 m to infinity).

Other features: Aperture scale from F3,5 to F32; adjustable film pressure plate usable with both 12 and 24 exposure load film; exposure load reminder window, threaded cable release socket; hinged back cover; bayonet-type filter mount accepting 30 mm filters.

Dimensions: 77 x 148 x 101 mm4www.butkus.org

Weight: 1,100 grams

Front of camera Side of camera Back of camera

1. Open the Battery Compartment Cover holding with finger and by turning it counter-ciockwise. This camera uses a 1.3 V mercury battery to power its exposure meter. Use either Mallory PX-13B, Eveready EPX-13 or equivalent.
(webmaster: see my link on mercury battery replacements )



2. Install a 1.3 V mercury battery to power the exposure meter, as illustrated.


1. Turn the ASA Film Speed Setting Wheel until the figure denoting the ASA rating of the film in use aligns with the red indicator in the ASA Film Speed Indicator Window.4www.butkus.org



2.  Center the desired shutter speed in the Shutter Speed Indicator Window by turning the Shutter Speed Control Dial. The exposure meter pointer in the Exposure Indicator Window is coupled to the shutter mechanism and will shift in either direction when the shutter speed is adjusted.


1. The exposure meter begins to function when the focusing hood is set upright by lifting it W gently with your fingertip.4www.butkus.org



2. When the camera is to be left unused, fold the focusing hood. This will switch off the meter and prevent draining of battery power.


Turn the Aperture Control Dial and coincide the yellow follower needle (coupled to the aperture mechanism) with the red meter pointer (coupled to the shutter mechanism), both visible in the Exposure Indicator Window.


· The correct combination of the shutter speed and lens aperture can be seen in the Shatter Speed and Aperture Indicator Windows.

* When the yellow follower needle (Y) perfectly coincides with the meter painter ( I ), it signifies that THE CAMERA is set for correct exposure. The proper combination of the shutter speed and aperture is shown in the Shutter Speed and Aperture Indicator Windows.

· If the yellow follower needle fails to align with the meter pointer, alter the shutter speed setting by turning the Shutter Speed Control Dial in either direction. If the two needles fail to match even when both the shutter speed an aperture settings are changed, it means that correct exposure cannot be obtained under the prevailing light condition.4www.butkus.org



ASA rating indicates the sensitivity of the emulsion of the film and is clearly imprinted on the box or instructions which come with the film.




Light Condition Average Subject
Bright sun 1/500 · 1/250 sec.
Cloudy bright  1/250 · 1/125 sec.
Heavy overcast or rain  1/60 · 1/30 sec.
Indoor  1/30 sec. or slower
Special conditions  1 sec. or B

Set desired shutter speed by turning shutter speed control dial. To determine Aperture control dial and align yellow follower needle with red meter pointer.


The camera features a magnifying lens for critical focusing which springs up into position when the sports finder frame section of the Focusing Hood is pushed in slightly.



To focus, turn the Focusing Knob while observing the image of your subject produced on the Focusing Screen. After focusing, compose your picture.4www.butkus.org



In focus 

THE CAMERA is in focus when the image on the Focusing Screen appears clear and crisp.




Out of focus Your subject will appear blurred on the Focusing Screen when it is out of focus.



1. The Back Cover will spring open when the Back Cover Locking Ring is turned in the direction of "O" (Open).

Note: The exposure counter resets automatically to "S" (Start) when the Back Cover is opened.4www.butkus.org



2. Pull out the Upper Spool Holder Knob and place the empty spool in the Take-Up Spool Chamber. After the Take-up Spool is set properly in the camera, return the Spool Holder Knob to its original position.


3. When loading a 120 film (12 exposures), hold the back cover with both hands and slide the Film Pressure Plate with your thumbs until it clicks into position and the sign 12 EX. (in green) appears in the window in the middle of the plate. When loading a 220 film (24 exposures), hold the back cover with both hands and slide the Film Pressure Plate with your thumbs until it clicks into position and the sign 24 EX. (in red) appears in the window in the middle of the plate. 

When sliding the Film Pressure Plate from 12 EX. to 24 EX., or vice versa, use both hands and then check if the plate spring is working properly by depressing the plate once or twice.

Uneven film feeding and poor focusing may result if the Film Pressure Plate is not properly positioned.

[4] Place the new roll of film in the lower film chamber while pulling out the Lower Spool Holder Knob. Also make sure that the Lower Spool Holder is returned to its original position after loading the film.


[5] Draw out the film leader gently and introduce its tip straight and amply into the slot on the spindle of the Take-up Spool. The film may fail to advance if the film leader is not inserted properly into the slot.


[6] After ascertaining that the trimmed edge of the film leader rests flush against the edge of the slot, turn the Film Wind Crank-handle gently in the direction of the arrow and check whether the film is advancing properly.


7. Continue winding the film until the "start" mark on the film leader paper lines up with the GREEN triangular (<) "start" mark for 120 film.



7b. Continue winding the film until the "start" mark on the film leader paper lines up with the RED triangular ( ) "start" mark for 220 film.4www.butkus.org


8. Then, close the Back Cover and turn the Back Cover Locking Ring toward "C" (Close) while pressing the cover. (When closing the Back Cover, see that the lug on the body rests properly in the slot on the Back Cover Latch.)

9. The letter ''S" appears in the Exposure Counter during the film loading operation. After closing the Back Cover, wind the crank-handle until the figure "1" appears in the Exposure Counter Window.



1.  First, turn the Crank-handle all the way in a clock wise motion (toward [1]).



2. Then, wind it all the way in a counter clockwise motion (toward [2]) to charge the shutter.4www.butkus.org

CAUTION: In case of slow shutter speeds (1 sec. to 1/50sec.), make sure the shutter mechanism completes its function before winding the film.


When the back cover is closed, the exposure load reminder window will show "12 EX" (green) in case of 120 film, and "24 EX" (red) in case of 220 film, to check the exposure load of the film in use.


After loaded the film, turn the Film Type Indicator as illustrated, so that the letters equivalent to the film type in use are indicated in the window.