Specifications

SHUTTER BUTTON LOCK

The shutter button lock lever is for your convenience while

you are making a particularly long exposure using the B

shutter speed setting. After depressing the shutter button,

turn the lock lever (which is on the collar at the base of the

shutter button) so that the letter "L" is visible. When the

exposure time is up, move the lock lever back to its original

position. This automatically releases the shutter button. In

addition to making "Time" exposure, the lock lever is also

used to turn off the meter circuit and simultaneously

prevent accidental release of the shutter.

MANUAL SHUTTER OPERATION

The two silver oxide batteries in your MX are used only for powering the

exposure meter; the shutter mechanism is a totally manual operation.

Therefore, your camera can still be operated even if the batteries have worn

out. If the batteries have worn out and the exposure meter is no longer

functioning, you must determine the correct combination of shutter speed and

aperture size yourself, from your own experience. Also, packed in with most

types of 35mm film is a data sheet with suggestions for determining the

correct exposure in a variety of situations.