Sony SAL500F80 Service Manual ▷ View online
4-15
SAL500F80 (REFLEX 8/500) (500mm F8 Reflex)
2)
Perform “4-2-1. Optical Axis Check/Adjustment”, and check that the optical axis of the checking lens is out of specification.
3)
Turn the knob of flange back tester so that the dial gauge indicates “44.57mm”. Then, adjust the focus by rotating the G1 lens holder.
4)
Loosen the G1 stopper so that it lightly touches the G1+G3+G7 assy.
Note:
When performing the following adjustments, if the G1 stopper is tightened too much, the G1+G3+G7 assy may be damaged.
If loosened too much, the G1+G3+G7 assy may tilt, resulting in improper adjustment.
5)
Turn three G1 adjustment screws to move the position of the G1+G3+G7 assy so that the red and green color shifts at the peripheral
of chart image are equal.
Fig.4-2-7
6)
If not adjusted in step 5), rotate the G1+G3+G7 assy so that either red or green area is minimized, and perform step 5).
7)
If the adjustment is not completed in step 6), perform as follows.
1.
Remove the helicoid (G1 lens holder) having the G1+G3+G7 assy from the helicoid unit.
2.
Loosen the G2 retainer until it touches lightly the G2+G4+G5 assy.
3.
Rotate the G2.G4.G5 joint ball as is done in step 6).
4.
Install the helicoid (G1 lens holder) having the G1+G3+G7 assy to the helicoid (G2 lens holder) having the G2+G4+G5 assy.
5.
Repeat steps 3 and 4) so that so that either red or green shift at the peripheral of chart image is minimized.
6.
Tighten further the G2 stopper 5 to 10mm from the position where the G2 stopper touches the part (G2 hold plate) inside.
8)
If step 6) or 7) are performed, perform step 5) again.
G1 Adjustment Screws (Three areas)
4-16
SAL500F80 (REFLEX 8/500) (500mm F8 Reflex)
9)
Turn the helicoids unit to the closest distance side (fully to the measurable range flange back tester).
Check that the red and green color shifts at right and left are even.
10) Apply the adhesive bond (B-10) in the width of 30mm to two indicated locations of G1 stopper (Refer to HELP 12)
11) Screw the G1 stopper into the helicoid unit until its tip touches the inner part (G1+G3+G7 assy).
And then tighten further the G1 stopper about 5 to 10mm.
Note:
After tightening, confirm that the lens inside the helicoid unit does not rattle when the helicoid unit is shaken.
Do not tighten the G1 stopper too strongly.
12) After adjustment, apply the adhesive bond (B-10) to two indicated holes of G2 stopper and attach it to the helicoids unit.
13) After adjustment, apply the adhesive bond (B-10) to the tip of the G1 adjustment screws (three areas).
Fig.4-2-7
Apply the Adhesive Bond (B-10)
Helicoid Unit
Apply the Adhesive Bond (B-10)
to Fix G2 Retainer (Two areas)
4-17
SAL500F80 (REFLEX 8/500) (500mm F8 Reflex)
4-3.
FLANGE BACK (f’F) ADJUSTMENT
Perform this adjustment after completing the “4-2. Optical Axis Check/Adjustment”.
Equipment
• Flange Back Tester
• A-mount Attachment
• Flange Back Gauge (43.50mm)
Note:
Use the collimator (1500 mm or longer)
1. Preparations
1)
Set the equipment according to “1. Preparations” of “4-2. Optical Axis Check/Adjustment’”.
2)
Remove the focus scale window unit of the outer barrel assy.
Fig.4-3-1
Outer Barrel Assy
Focus Scale Window Unit
4-18
SAL500F80 (REFLEX 8/500) (500mm F8 Reflex)
3)
Mark the scrape line to the outer barrel assy that corresponds to the index line of the detached focus scale window unit as shown in
the figure.
Fig.4-3-2
4)
Attach the outer barrel assy, focus connect ring, gear block, filter and mount block tentatively to the helicoid unit.
2. Adjusting Method
1)
Attach the checking lens to the flange back tester, and set the collimator (1500 mm or longer).
Fig.4-3-3
Collimator (1500 mm or longer)
Checking lens
Index Line
Mark the Scrape Line
Focus Scale Window Unit
Outer Barrel Assy
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