JAA80251-R.3723.A
- Ａ 42・AF-S 24-70/2.8G -
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
A
＝
Value at TELE side
B
＝
Value at WIDE side
C
＝
Adjustment amount (mm) of the washer (#77) of the 1st
lens group
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.
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 B
＝
Value at WIDE side
C
＝
Adjustment amount (mm) of the infinity focus adjusting washer (#78)
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
.
Focal length (f)
Standard (mm)
24 mm
+
0.00
～ +
0.08 +0.03
～
+0.09
35 mm
-0.12
～ +
0.08 -0.07
～
+0.08
70 mm
-0.10
～ +
0.15 -0.07
～
+0.12
ref. Page A39
ref. Page A33
Adjustment of Focus movement (T, W)
Adjustment of F.F.D (Infinity focus)
Horizontal collimator
(Revision)
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Mar. 31, 2008
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