Projective Resolving Power Check - Sony SAL135F28 Service Manual

4-3.

PROJECTIVE RESOLVING POWER CHECK

Equipment
• 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)
1. Preparations
Note:
• Check the projective resolving power of the checking lens at the following focal-length and distance.
Focal-length f (mm)
135
Table 4-3-1
• Set the stepless aperture of the checked lens to "A".
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.
Note:
Be sure to have the right position and direction of the lens.
Fixed lever
Lens test projector
SAL135F28 (STF 2.8(T4.5)/135) (135mm F2.8 [T4.5] STF)
distance (m)
5.4
Lens
Fixed lever
Lid
Fig.4-3-1
Incorporate of the lenses
according to the checking focal-length (f).
Heat-absorbing filter
Chart
Filament
f=18 to 35 mm
Chart
Filament
f=35 to 100 mm
4-24
Chart
Filament
f=100 to 200 mm
Chart
Filament
f=200 to 300 mm