Projective Resolving Power Check - Sony SAL1680Z Service Manual

4-3-2. Projective Resolving Power Check

Note:
• Check the projective resolving power. If it does not meet the specification, adjust the projective resolving power, projective
resolving power (partial blur) adjustment meet the specifications respectively.
Projective Resolving Power (Partial Blur) Adjustment
Check the projective resolving power. Conform the following adjustment if necessary.
1) Set the focal length of lens to 80 mm and adjust the focus so that the center "y'= 0" reaches the maximum resolution.
2) Check projective resolving power at reach peripheral point of "y'= 12".
If the projective resolving power does not meet the specification, perform the following.
(1) Rotate the 4th lens block, adjust the defective parts to out of picture frame.
(2) If the adjustment is impossible according to the procedure (1), replace the 4th lens block.
(3) If the specification is not improved according to procedure (2), replace the 2nd lens block.
SAL1680Z (Vario-Sonnar DT 3.5-4.5/16-80 ZA) (Vario-Sonnar T DT 16-80mm F3.5-4.5 ZA)
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