Konica Autoreflex A
posted 1-21-'04

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To Part Two

   
  CONTENTS
 
  Name of Each Part    
4
  Major Specifications for KONICA AUTOREFLEX A...
9
  Loading of Mercury Battery Cells    
10
  Handling of Mercury Battery Cells    
11
  Film Loading    
1 2
  Shutter and Aperture    
16
  TTL Metering and Fully Automatic Control    
18
  Name of Meter in Viewfinder    
21
  Watching Meter in Viewfinder    
22
  Electric-Eye Photography    
24
  Meter's Coupling Range    
26
  Important Points for Light Measurement at Full Lens Opening    
 
28
  Training of Camera    
30
  Focusing    
32
  Depth of Field    
34
  Infrared Film Compensation Mark    
36
  Depth of Field Table   
38
  Film Rewind   
40
  B (Bulb) Exposure    
42
  Synchroflash Photography    
43
  Exposure for Synchroflash Pictures    
45
  Lens Interchange    
46
  Stopped-Down Aperture Measurement    
48
  Important Points of Stopped-Down Aperture Measurement   
   
50
  Hexanon Interchangeable Lenses    
52
  Accessories    
56
   

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Picture of top

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MAJOR SPECIFICATIONS FOR KONICA AUTOREFLEX A
         

                                
                    Type : 35 mm SLR equipped with focal plane shutter and built-in CdS meter for automatic exposure determination.
            Picture Size : 24 X 36 mm.
           
                    Film : 35mm film in cartridge, 20 or 36 exposure. 4www.butkus.org
       
        Standard Lens: HEXANON 57mm f/1.2 (6-group and 7-element), 57mm f/1.4 (5-group and 6-element) or 52 mm f/1.8 (5-group and 6-element). Minimum taking distance 1.5 ft. (0.45m.)
                  Mount: KONICA Mount II (bayonet), 47mm. in diameter and 40.5 mm. in flange back.
 
      Aperture Device : Fully automatic aperture (automatic full lens opening).
   
                Shutter : Copal Square S, B, 1 - 1/500 sec. calibrated in equally-graded 1 :2 progression, M and X synchro, electronic light coupled to 1/125 sec. with X synchro and to all shutter speeds with M synchro.
             
Viewfinder: Eye-level viewfinder using pentaprism, lens focused with Micro Dia Prism of dispersion alignment type at viewfinder center.   Meter visible within field of view.
                  Mirror: Mirror edge vertically flips.   Full quick return type.
     
  Exposure Adjustment : TTL system using super-high sensitive compound CdS meter (light measured mostly at center of picture image). Automatic aperture lens Electric-eye: Full electric-eye system coupled to film speed, shutter speed and interchangeable lenses at full opening. Manual aperture: direct reading of f-number coupled to film speed, shutter speed. Manual pre-set aperture lens-zero method after camera is set to film and shutter speeds. Zero-method system in which camera is coupled to pre-set aperture, film and shutter speeds.   Two 1.3V mercury battery cells used as electric source.
    EE Coupling Range: EV4.5 to EV17 with ASA 100. Coupled to ASA 25 to 1,600 (DIN 15 to 33).
 
              Film Wind : Film wound by cocking wind lever in single action.   Shutter charged and mirror and automatic aperture set simultaneously.
          Film Counter : Automatic Film Counter which returns to "Start" mark simultaneously with opening of back cover and indicates number of pictures exposed.
            Film Rewind: Film rewind button depressed at first for subsequent film rewind with crank. Button automatically returns to original position. 4www.butkus.org
Dimensions and Weight: With f 1.8 lens -- 148 mm (width) 95mm (height) X 89 mm (thickness), 930grams. With f/1.4 lens - 148mm (width) 95mm (height) X 90mm (thickness), 1,010 grams. With f/1.2lens - - 148mm (width) X 95mm (height)   96mm (thickness), 1,200grams.
LOADING OF MERCURY BATTERY CELLS
   
     
Picture The compound CdS meter of the KONICA AUTOREFLEX A takes two 1.3V mercury battery cells as its electric source. Wipe the mercury battery cells, accessories for camera, with a piece of dry and clean cloth and put them into the mercury battery chamber.

1. Turn the cover of the Mercury Battery Chamber 27 counterclockwise with a coin and detach it from the chamber.

2. Insert the two cells into the mercury battery chamber, the "+" side up, according to the figure printed on the seal inside the chamber. After the cells have been put into position, put the cover on the chamber and screw it tightly.

  
     
Handling of Mercury Battery Cells
 
* A mercury battery is fully serviceable for more than one year if used normally. The battery voltage drops abruptly when it becomes weak, the CdS meter will stop normal operation. When the meter pointer does not move even in bright light, replace the battery with a new one.
For the mercury battery, it is recommendable to use 1.3V battery, Mallory PX-675 or Eveready EPX-675.

Since there are various batteries which resemble the above, but are of a different voltage than that required, caution should be observed when replacing so as not to damage the camera. When not using the camera for a long period, store it in a place with little moisture after taking out the mercury battery.

FILM LOADING
   
Picture
    
* The KONICA AUTOREFLEX A takes 35 mm roll film which comes in a cartridge.
   
Picture
* For film loading, avoid the direct sunlight and do it in the shade. If there is no shade, one way would be to use the shadow of your body.
   
1 Pull the Back Cover Lock 26 and open the Back Cover 32 of the camera.
2 Direct toward the underside of the camera that side of the cartridge through which its spindle sticks out and put the cartridge into the Cartridge Chamber 2 .		    
       
           
     
Picture

 

    

Picture

 
     
         
3 Insert the film tip into the Film Take-up Slit 33, of the Film Take-up Spool 34). Any slit is usable. Choose any slit into which the film tip can be inserted with ease. 4www.butkus.org
  4 Turn the Film Cocking Lever (17) and take up the film on the spool. Ascertain that the teeth of the Sprocket 15) r in gear with film perforations, before the back cover is to be closed. Depress the back cover with o finger tip, and it will be closed with ease.
     
Picture
     Picture
       
      7. Wind the film and depress the Shutter Button (1(. Repeat this action until the figure "1" appears in the Film Counter Window 18.
5. After the back cover is closed, flip up the Film Rewind Crank 13 and turn it in the direction indicated by an arrow mark on it to reduce the slack of the film.
 
   
  Turn the Film Cocking Lever until it does not move further and the film will be transported by one frame and the shutter charged at the s time. The mirror and the automatic aperture will also be set.
 
Picture
  
<> Each time when the cocking lever manipulated, the film counter advances one reading, indicating the number of pictures that have been taken. When the back cover is opened after the exposure of a roll of film, the film counter automatically returns to the "S" (Start) position.
   
       
           
        To Check Film Advance: When the film is being taken up in a correct manner, the Film Rewind Knob 14) turns counterclockwise. If it does not turn counterclockwise, it means that the film is not being properly wound.
SHUTTER AND APERTURE
       
A shutter is designed to control the amount of light reaching the film surface in terms of time and photographically to fix an image of a subject on it. The shutter speed scale has calibrations of B and 1 to 500.   The readings of 1, 2, 4, 8 .... 500 indicate the shutter speeds of 1, 1/2, 1/4, 1/8 .... and 1/500 sec., respectively.

  • Use of Electric-Eye (EE) Release Button

    This lens is provided with an EE lock system to prevent the "EE" mark of the aperture ring from accidentally slipping off the index mark.

    When you want to use the manual aperture instead of using your camera in the EE system, push the button on the aperture ring and then turn the ring. When your camera is re-set to "EE", the ring will automatically lock into position without depressing the ring button.

    The shutter speed reading of "B" is used when there is the need for the exposure of over one second.

    (See the explanation on "B Exposure" on Page 42.)
    The colored figure of "125" is the maximum shutter speed for synchronization with electronic lights.
    Do not turn the shutter speed dial while the shutter button is depressed. 4www.butkus.or

    • The lens aperture is designed to control the amount of light reaching the film surface in terms of area and the depth of field (See Page 34), the scope in which the lens may be focused on a subject. The aperture ring of each lens has a scale of f-numbers, ranging from a reading for its full opening to a reading at the time the lens is fully stopped down. The aperture ring clicks into position at each lens aperture reading. As the ring moves from f/2 to f/2.8, the amount of light reaching the film surface proportionally increases. Their relations are indicated in the above figure. For example, the amount of light at f/4 is half the volume of f/2.8, and the amount of light at f'5.6 is half the volume of f'4.
     The aperture of a lens bearing the mark of "Electric Eye" is fully automatic. Only during the split moment when the shutter is released, the lens is stopped down to a determined f-number and then automatically returns to the full opening at once.
     
           
    Picture
    TTL METERING AND FULLY AUTOMATIC CONTROL  
    The KONICA AUTOREFLEX A incorporates the latest exposure system in which the compound CdS meter which measures at the center of the taking lens the light coming through the taking lens, and this system is tied in with a fully automatic Electric-Eye (EE) exposure control, making it possible effectively to secure a correct exposure at an instant.
    		 
    In the fully automatic exposure control, the values of shutter and film speeds, as indicated in a separate figure, are transferred to the CdS meter by a coupler. The value of a fully automatic aperture (Electric-Eye) lens is transferred from the f-number transfer level to the coupler and then by a differential gear to the meter. At the same time, the mark indicating the f-number at the full lens opening of the use lens will be shown in the field of view.
    		 
      The two CdS cells situated on both sides of the eyepiece and directed inwards measure light on the focal plane, and the measured value is transferred from the circuit having a compensatory resistor and a variable resistor to the meter, making it possible for the meter to start its operation and automatically to determine a correct exposure. The determined f-number will be shown by the meter needle visible in the field of view. 4www.butkus.org

    NOTE: In the event that you are possessed of a fully automatic aperture lens of the Electric Eye type for use on the KONICA AUTOREFLEX, it will be remodeled at any service station of the KONICA camera agent without any trouble.


    		      

    		  
           
    WATCHING METER IN VIEWFINDER
    		 
    Correct Exposure Range: The stopping of the Meter Needle #2 within the range of correct exposure (or somewhere on the f-number scale for the used lens) is an indication of the feasibility of taking pictures under the Electric-Eye system. Here, the meter needle shows the aperture to which the taking lens is to be set for a shot.
    Warning Marks and Mark for the Indication of F number at the Full Opening of the Lens: The red mark visible on the top of the f-number scale visible in the field of view is a mark for the warning of underexposure for an f/1.2 lens. If the lens is not f/1.2 in brightness, the Mark for the Indication of the F-Number at the Full Lens Opening (43) will show the f-number at the full opening of the taking lens. If the meter needle is aligned with this mark, pictures will be under-exposed. The signal placed at the bottom of the f-number scale is a warning mark for over-exposure. If the meter needle is brought in line with this Over-exposure Warning Mark 40, it will be impossible to secure a correct exposure. Index Point for Stopped-Down Aperture Measurement : When the lens is stopped down for the measurement of light the meter needle will be aligned with the Index Point 39, if a combination of shutter speed and lens aperture which assures correct exposure for the film used in the camera comes out.
    Manual Aperture Indicator Mark: "M", the Manual Aperture Indicator Mark 44,, indicates the non-alignment of the Electric Eye Mark I~ of the Aperture Ring 12 with the index mark for a fully automatic aperture (Electric-eye) lens. When the camera is not used under the Electric-eye system, the alphabet "M" is visible at all times, indicating that the aperture of the lens may be manually operated. 4www.butkus.org
     

    To Part Two