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Mirror Lock-up
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When the camera is mounted on a tripod for copy work or telephotography at
long (slow) shutter speeds, the small amount of vibrations due to”mirror-bounce”,
which normally are of 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, merely move the mirror lock-up lever (23) backwards,
until it is horizontal (the lever may be lowered either before or after cocking the
shutter).
2. With the shutter cocked, release the shutter with a cable release. After
releasing the shutter, you may wind the film advance crank with the mirror still
in the up position if you wish.
*
Return the mirror to its normal position immediately after completing all of
your mirror lock-up photography.
*When using the 70mm f/2.8 lens (w/between-the-lens shutter), be sure to
refer to the instructions packed with the lens.
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