5. Setup11112Image 5-16Back Focal length adjustment.1 Locking screws2 Adjustment holeImage 5-17A wrong back focal length adjustment will not allow optimal focus throughout the full zoom range.Necessary tools• BFL adjustment tool• Allen key 2.5 mm (hexagonal key)How to adjust ?1. Loosen the 4 screws along the outline of the lens (top, bottom, left, right)Tip: Only loosen these screws a bit. Just enough to allow the lens to be shifted forward and backward.R59770330 SIM 7QP SERIES 08/12/2014 43