Sony E 10-18 mm f/ 4 OSS Lens Manuale Istruttivo

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SAL24105 (3.5-4.5/24-105) (24-105mm F3.5-4.5)

• Check the projective resolving power. If it does not meet the specification, adjust the projective resolving power.

• The following projective resolving power adjustments 1 and 2 meet the specifications respectively.

Check the projective resolving power. Confirm whether the focused point should locate in front or at back of the focused peripheral

points, and adjust.

1)

Set the focal length of lens to 105 mm and adjust the focus so that the peripheral “y’= 18” reaches the maximum resolution.

2)

Check the resolution of center “y’= 0”. (Check whether it locates in front or back of the projected plane.)

3)

According to the position of maximum resolution of center “y’= 0”, increase or decrease the thickness of washer to adjust the interval

between 3rd group and 4th group by the amount calculated by the formula below.

(1) If the position of maximum resolution of center “y’= 0” locates in front, decrease the thickness of spacer adjustment washer.

(2) If the position of maximum resolution of center “y’= 0” locates at back, increase the thickness of spacer adjustment washer.

Amount of thickness of adjustment washer for adjusting the space between 3rd and 4th groups = Distance (cm) measured in step 2)

/0.002

4)

If the projective resolving power does not meet the specification, adjust again.

Check the projective resolving power. Conform the following adjustment if necessary.

1)

Set the focal length of lens to 105 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’= 18”.

If the projective resolving power does not meet the specification, replace the 4 group lens block.