12
E
Lenses with zoom function
① Image an object with high resolution(letticed) at a distance of 3 to 5 m
and zoom in the lens as close to TELE as possible. Then adjust the lens
focus bar until the object is seen best.
➁Zoom in the lens as close to WIDE as possible and adjust the BACK
FOCUS adjustment bar until the object is seen best.
➂Repeat from ①to ➁above 2 or 3 times until the focus on the ZOOM
TELE side is in line with that on the ZOOM WIDE side.
BACK FOCUS
CONTROL BAR