Olympus X-Tr Repair Manual - Page 30
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6.
Defective Binocular Vision
Image
distortion
caused by
change of
optical
materials
with the
passage of
time
1)
Image is not equally
focused in north-south
and east-west directions
as shown in diagrams of
5/100 concentric circles,
right.
2)
Check up which optical element causes image distortion as
diagramed above.
3)
Check image distortion at each magnification of drum lenses.
a.
When image is distorted at all magnifications:
Distortion is caused by right or left prism, B lens,
objectives or dust glasses.
b.
When image is distorted only at 40X and 6.3X magnifications:
One of 40X and 6.3X drum lens is defective.
c.
When image is distorted only at 25X and lOX magnifications:
One of 25X and lOX drum lens is defective.
4)
In case of "b" or "c":
Replace lenses one by one until defective one is found.
5)
In case of "a":
Until defective lens(es) is(are) found, replace all the
elements concerned one by one in the order as follows:
Dust glasses - objectives - B lens - prisms - porro-prisms.
6)
After replacement of defective element(s), follow steps for
optical adjustments.
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