Durst DA-900 - Wheel-Grip for Focusing both the Lenses

10
base (1). Do not forget to weight down the projection board (2) to
prevent the enlarger from tipping over. During floor projection focus
by hand operating the wheel-grips
(31 and 32) for the adjustment of
the lens bellows. If the automatic focusing is required again, the lens
bellows
must be locked again in the correct position.