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Fixing the Mirror Upwards
In performing super-telephoto or photomicrography, the
Canon F-1 can be operated with the mirror locked in the
up-position after the picture has been composed in the
viewfinder. To lock the mirror in the up-position, push
the stopped-down lever-towards the lens and the lock
lever to "M". The aperture is now stopped-down and
controlled manually.
The mirror can be locked independently from film
advance and shutter speed operations.
When the mirror is locked in the up-position, SLR
viewing is not possible, distance must be estimated by
eye, and the 1/2000 second shutter speed cannot be
used.
When the mirror is locked, keep the lens covered if
you are not using the camera. The film will sometimes
be fogged if the lens cap is left unattached.
After the mirror lock device has been used, be sure to
return the mirror lock lever to its original position.
Failure to do this will result in inexact focusing.
When the original model Canon FL 19mm f/3.5 lens
is used, the mirror should be fixed in the up-position.
Use of the special viewfinder made for this lens becomes
necessary.
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