Projective Resolving Power Check/Adjustment; Projective Resolving Power Check - Sony SAL1855 Service Manual

4-3.

PROJECTIVE RESOLVING POWER CHECK/ADJUSTMENT

Equipment (Only the specific equipment is listed.)
• Adhesive bond (B-10)

4-3-1. Projective Resolving Power Check

1. Perform "LENS GENERAL ADJUSTMENT GUIDE 4. PROJECTIVE RESOLVING POWER CHECK".
Specification
Focal length f (mm)
18
35
55
2. Check the projective resolving power. If the projective resolving power does not meet the specification, perform "4-3-2. Projective
Resolving Power Adjustment".
4-3-2. Projective Resolving Power Adjustment
Check the projective resolving power. If the projective resolving power does not meet the specification, perform the projective resolving
power adjustment.
Improve the projective resolving power in the following procedure.
1. Remove the front decoration plate, front ring and focus rubber ring.
2. Remove one screw fixing the 1st lens barrel block and adjust by rotating the 1st lens barrel block. (It can be rotated every 60
degrees.)
Note:
Even if the 1st lens barrel block is adjusted by rotating, if the specification is not satisfied, replace the 2nd Lens barrel block.
If the specification is still not satisfied, replace the 1st Lens barrel block.
Screw
3. Perform the projective resolving power check again and confirm that the specification is satisfied.
SAL1855 (DT 3.5-5.6/18-55 SAM) (DT 18-55mm F3.5-5.6 SAM)
Distance (m)
Center (y' = 0)
1.20
100 lines
2.23
or greater
2.23
Front Decoration Plate
Front Ring
Focus Rubber Ring
1st Lens Barrel Block
Fig.4-3-1
Number of the smallest pitched lines/mm
Peripheral (y' = 9)
S M
40 lines 32 lines
or greater or greater
Table 4-3-1
4-5
Peripheral (y' = 12)
S
32 lines
or greater or greater
4-1-2. Adjustment Flow Chart
M
25 lines