JAA80551-R.3757.A
- ・AF-S DX 8-05/3.5-5.6G ED VR -
When the 5th lens-G unit or 3-4 lens-G unit, check the average focus positions of the central and peripheral
point images on the confirmation screen of the lens alignment software.
If the difference of average focus position between the central and peripheral point images shows a distance
that corresponds to "1.5-or-more measurement count", adjust thickness of the washer (#77) which is under the
5th lens-G unit so that the above difference becomes "less-than-1.5 measurement count".
Note: The focus position of point image is the measurement count/position (horizontal axis-coordinate)
at the turning point (or vertex) of curve line. (see below) So to check the focus position, confirm
the average of four points each of central and peripheral point images.
Measurement result of peripheral
point image
Measurement result of
central point image
Average focus position of
peripheral point image
Measurement count: 1
Difference of average
focus position
3
4
5
6
7
2
・
Go back to [2. Chart shooting for the rear lens group alignment] ( Page A44).
Chart shooting for the rear lens group alignment] ( Page A44).
] ( Page A44).
Repeat this procedure of [2. Chart shooting for the rear lens group alignment] (page A44) and [5. Rear lens
Chart shooting for the rear lens group alignment] (page A44) and [5. Rear lens
] (page A44) and [5. Rear lens
group alignment] (Page A51).
3. Field curvature adjustment
Average focus position of central
point image
Turning point (or vertex) of
curve line
INC