�Hold the lens-barrel unit lightly with a hand, and run the program for inspecting the lens unit. Note: If the lens-barrel unit is held too tightly, the FFD value cannot be measured correctly. Note: Refer to supplied user manuals of the lens unit checking tool for how to run the program for inspecting the lens unit.
� On the main menu of the lens unit checking program, click on "FFD Check" icon, and measure the FFD value according to instructions of the PC screen. Note: At the position where the color of vertical lines shifts from blue to red, read the measurement value of the adjusting focus stand. FFD adjustment � Make adjustment by turning the 1st lens group so that the FFD measured value may be within the standard as shown below. Zoom position Wide-side Tele-side FFD standard ± 0.05mm ± 0.05mm Measured value in relation to reference value (-2.16mm) -2.21���-2.11 -2.21���-2.11
� Make adjustment at the Tele-side. � After the adjustment is finished, apply the screw lock to the 1st lens group unit.
