Time Exposures; Mirror Lock-Up Photography - Mamiya M645 Super User Manual

To take time exposures, set the Shutter
Speed Dial to "B" and use a cable
release with a lock provision. Inserting
an optional Cable Release Adapter into
the Auxiliary Release Contact of camera
body, allows a cable release to be
used.
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When the camera i s mounted on a
tripod for copy work, close-ups or tele-
photography at long (slow) shutter
speeds, the small amount of vibration
due to "mirror-bounce", which is nor-
mally o f no consequence, may cause
blurring of the image due to the high
magnification encountered in extreme
close-ups and telephotography. Mirror
shock can be eliminated by locking the
mirror in the up position before making
the exposure.
. 1. To lock the mirror up, move the
Mirror Lock-up Lever to "M. UP"
until it clicks.
2. With this setting, the mirror is
locked up. Naturally, no image can
be seen on the screen through the
viewfinder. Consequently, when
adjustments for composition and
focusing are required return the
mirror to its normal position. (lower
the mirror).
*When using the 70mm Leaf Shutter
Lens, be sure to refer to the instruc-
tions packed with the lens.