Specifications

METER COUPLING RANGE
The exposure meter of the MX measures the brightness of the ground glass. Therefore, the proper LED exposure
read-out should be obtained after you have focused your subject on the ground glass. The green area in the table
indicates the coupling range of the meter, and should not be interpreted as the camera's total range of f/stop-shutter
speed combinations. As you will note from the table below, with ASA100 film, you may use any shutter speed from 1
sec. to 1/1000 sec. in combination with any aperture that will illuminate the green LED in the viewfinder. The total
range of the aperture settings is, of course, determined by the minimum and maximum apertures of the lens being
used. For example, with the 50mm f/1.4 lens and ASA100 film, an aperture from f/1.4 (the maximum aperture of this
lens) to f/22 (the minimum aperture) may be used with any shutter speed from 1 sec. to 1 /1000 sec. that will
illuminate the green LED.
1. As exposure measurements made at 1/1000 sec. with 25 ASA film will not be accurate, exercise caution.
2. When using the 50mm f/1.4 lens, accurate exposure measurement at the points found in the shaded area in the
above table can be guaranteed only when using up to f/16 (f/1.4 - f/16).
HELPFUL HINTS ON EXPOSURE PROBLEMS
The exposure meter built into your MX takes a center-weighted reading from the entire scene as seen through the
viewfinder. Sometimes, however, there is a great difference between the light reflected from the background and the
light reflected from the subject. In such a case, to achieve a really good photo, you must compensate for the difference
by opening or closing down the aperture 1 or 2 stops. As a general rule, when the subject is darker than the
background, you compensate by opening your aperture 1 or 2 stops more. For example: on a bright day, when your
subject has his back to the sun and you are shooting directly toward the sun ... or when you are shooting a subject
against snow or light-colored sand ... or when you are copying a page of black letters on white paper, increase the size
of the aperture somewhat. When your subject is brighter than the background - if he is standing in a spotlight, for
example - you make the aperture 1 or 2 stops smaller to compensate.
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DUAL CONTROL EXPOSURE SYSTEM
Since both the aperture and shutter speed are indicated within the viewfinder, you can control exposure by adjusting
either the shutter speed dial or the aperture ring. When the aperture size is the most important factor, set the aperture
desired by turning the aperture ring. Then adjust the shutter speed dial until the green LED illuminates.
When shutter speed is the more important factor, turn the dial to the speed you desire. Then adjust the aperture ring
until the green LED illuminates.