Adjustment Of Focus Movement (T, W); Adjustment Of F.f.d (Infinity Focus) - Nikon AF-S Zoom-Nikkor ED 24-70mm/F2.8G (IF) Repair Manual

Adjustment of Focus movement (T, W)

① Select "6. Infinity positioning for FFD adjustment" of AF-S24-70 inspection and adjustment software
(J18427), and perform "∞" (infinity) adjustment.
② Fix the aperture lever so that the aperture is full open.
③ Read each value of WIDE or TELE sides.
④ Calculate as follows:
[(A － B）/ 3] － 0.02 ＝ C
⑤ Increase/decrease the washers (#77) for adjusting the thickness by the above "C" value. If "C" is plus,
increase the thickness of it, while it is minus, decrease the thickness of it.
Note: When the washer (#77) is put, place a thin washer between thick washers.

Adjustment of F.F.D (Infinity focus)

① Select "6. Infinity positioning for FFD adjustment" of "AF-S24-70 inspection and adjustment software
(J18427), and perform "∞" (infinity) adjustment.
② Fix the aperture lever so that the aperture is full open.
③ Set the zoom ring to WIDE, and read the value.
④ Calculate as follows:
B / 0.6 － 0.05 ＝ C
⑤ Remove the bayonet mount.
⑥ Increase/decrease the washers (#78) for adjusting the thickness by the difference from the standard value.
If the difference is plus, increase the thickness of it, while it is minus, decrease the thickness of it.
Horizontal collimator
Focal length (f)
Change page △ x1
ref. Page A39
A ＝ Value at TELE side
B ＝ Value at WIDE side
C ＝ Adjustment amount (mm) of the washer (#77) of the 1st
lens group
ref. Page A33
B ＝ Value at WIDE side
C ＝ Adjustment amount (mm) of the infinity focus adjusting washer (#78)
24 mm
+0.00 ～ +0.08
35 mm -0.12 ～ +0.08
70 mm -0.10 ～ +0.15
- Ａ 42・AF-S 24-70/2.8G -
(Revision)
Standard (mm)
+0.03 ～ +0.09
-0.07 ～ +0.08
-0.07 ～ +0.12
INC
JAA80251-R.3723.A
サービス
計画課
Ｍ
Mar. 31, 2008