Lenses with zoom function
①Image 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
Efocus 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 ① to➁ above 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
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