Pentax 6x7 Manual page 5

OUTER BAYONET MOUNTING LENSES _ _ _ _ _ _ _ _
SMC TAKUMAR
SMC TAKUMAR
SMC TAKUMAR
SMC REFLEX TAKUMAR
400mm F4
600mm F4
800mm F4
l000mm F8
All these 67 Lenses match with the outer
bayonet mount of the 6 x 7 camera .
To Mount: Loosen the fastener ring surround-
ing the lens mount and position it with the
white dot facing upward (Photo C). Then ,
match the lens mount with the outer bayonet
mount of the camera , insert the bayonet tabs
and turn the fastener ring to the right as
illustrated in Photo D.
Note : Check that the lens is mounted securely
before letting go. If the bayonet tabs have
not caught properly, the lens may fall off when
you let go