Optika Italy B-380 Manuel D'utilisation page 7

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Take one of the eyepieces out of the tube, and insert the centering telescope. Rotate its upper part in order
to view a sharp image of the phase ring:
Adjustable upper part
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Typically, you have to see a pair of rings: one brighter and one darker. The bright one is the image of the an-
nulus on the condenser, while the dark one is the phase ring inside the objective:
Image as seen in the telescope
•
Rotate the levers on both sides of the condenser. You will notice that the bright ring will change its position:
Centering telescope
Levers for phase ring alignment
Page 7