Projective Resolving Power Check - Sony SAL28F28 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)
28
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.
SAL28F28 (2.8/28) (28mm F2.8)
distance (m)
0.8 to 1.16
Table 4-3-1
Fixed lever Lens
Fixed lever
Lid
Lens test projector
Incorporate of the lenses
according to the checking focal-length (f).
Heat-absorbing filter
Chart
f=18 to 35 mm
Chart
f=35 to 100 mm
Fig.4-3-1
4-9
Chart
Filament Filament
f=100 to 200 mm
Chart
Filament Filament
f=200 to 300 mm