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4-4
SAL18552 (DT 3.5-5.6/18-55 SAM Ⅱ) (DT 18-55mm F3.5-5.6 SAM II)
3) Loosen a little two screws and move right and left the preset ring so that the preset ring can move right and left.
4) Observing the light source from the rear lens side, move right and left two screws and tighten two screws at the position where the aper-
4) Observing the light source from the rear lens side, move right and left two screws and tighten two screws at the position where the aper-
ture blades are just completely hidden by the neighboring frame.
Two Screws
Apply the adhesive
bond (B-10)
bond (B-10)
Fig.
4-2-9
5) Perform 4-2-1. Aperture Diameter Check and repeat steps 1) to 4) until the aperture diameter (aperture tolerance) satisfies the specifi-
cation.
6) After finishing the adjustment, apply the adhesive bond (B-10) to the heads of screws tightened in step 4) at two locations.
4-3. PROJECTIVE RESOLVING POWER CHECK/ADJUSTMENT
Equipment (Only the specific equipment is listed.)
• Adhesive bond (B-10)
• Adhesive bond (B-10)
4-3-1. Projective Resolving Power Check
Setting of Lens Test Projector.
Equipment
• Lens Test Projector and Variable Transformer (Output voltage: AC 100 V)
• Lens Test Projector and Variable Transformer (Output voltage: AC 100 V)
Note:
Connect the variable transformer (Output voltage: AC 100 V) to the lens test projector.
• A-mount Attachment
• Screen (Art paper)
• Tape Measure
• Plane Mirror (For SLRs)
• Screen (Art paper)
• Tape Measure
• Plane Mirror (For SLRs)
1. Preparations
1) Perform the following steps (1) to (3), and incorporate the internal lenses of the lens test projector according to the checking focal
1) Perform the following steps (1) to (3), and incorporate the internal lenses of the lens test projector according to the checking focal
length.
(1) Open the lid of the lens test projector.
(2) Pull up and turn the fixed levers on the right and left sides of the lens test projector.
(3) Remove or insert the lens.
(1) Open the lid of the lens test projector.
(2) Pull up and turn the fixed levers on the right and left sides of the lens test projector.
(3) Remove or insert the lens.
Note:
Be sure to have the right position and direction of the lens.
Lens test projector
Incorporate of the lenses
according to the checking focal-length (f).
according to the checking focal-length (f).
Lens
Fixed lever
Fixed lever
Lid
f=18 to 35 mm
f=35 to 100 mm
f=100 to 200 mm
f=200 to 300 mm
Heat-absorbing filter
Chart
Chart
Chart
Chart
Filament
Filament
Filament
Filament
Fig.
4-3-1
2) Attach the checking lens to the lens test projector, and set the equipment as shown in Fig. 4-3-2.
3) Turn the fan switch of the lens test projector to ON, then turn the lamp switch to ON.
3) Turn the fan switch of the lens test projector to ON, then turn the lamp switch to ON.
Distance
Lens test projector
Chart
Fan switch
Lamp switch
Plane mirror
Screen
A-mount attachment
Checking lens
F
L
Fig.
4-3-2
4) Turn the focus ring of the checking lens until the chart image projected on the screen is the sharpest at the center (y = 0).
5) Set the plane mirror to the center of the projected image (y = 0), and adjust the projector position so that the mirror reflects the light to
5) Set the plane mirror to the center of the projected image (y = 0), and adjust the projector position so that the mirror reflects the light to
the center of the lens.
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