Olympus DP80 Instructions Manual page 24

Field number
22
20
} If the camera is attached in a wrong direction, the direction of the
} The acquired field is as shown in the left figure.
0.63X (FN 17.5)
1X (FN 11)
} The view field range illustrated in left figure is just a guide. Check
CAUTION
image observed through the eyepiece does not match with the
direction of the image through the camera. After the camera is
installed, compare the image observed through the eyepiece to the
live image acquired by the camera, and rotate the camera adapter
accordingly to match these images.
If a B4-mount camera adapter from other manufacturer than
Olympus is used, the optical performance of the system may not be
manifested fully.
the actual view field range by observing the specimen equipped
with a scaling function, etc. before use.
Be sure to adjust the parfocality between the B4-mount camera
adapter and the eyepieces. Otherwise, the image through the
camera and the image through the eyepieces are not parfocal.
For the parfocality adjustment method, refer to the instruction
manual for the camera adapter in use.