34
4. Hold a phase contrast ring and, while pushing the spring ƒ inside the
turret with the edge of the phase contrast ring …, insert the ring com-
pletely in the turret position until the ring frame contacts the bottom of the
position.
(Fig. 48)
#Be careful not to apply pressure to the ring slit inside the frame.
5. Rotate the optical element centering knobs clockwise to tighten the
centering screws lightly.
#If the optical element centering knobs are mounted, the turret is un-
able to be rotated.
#Do not tighten the optical element centering knobs too much, for
this may deform the frames of the optical elements.
6. Place the index † provided with each optical element in the index inser-
tion hole having the same number Š as the number of the position ‡ in
which the corresponding optical element is mounted. (Figs. 49 & 50)
}Note that the IX-ULWCD does not have the index.
}The optical element with the number indicated by marking · ‰ is
engaged in the light path. (Fig. 49)
}To remove an optical element index, use the tip of a ball-point pen or
mechanical pencil.
7. When all of the required optical elements have been mounted, attach
the cover and tighten the detaching screws.
Fig. 48
ƒ
…
Fig. 49
†
Š
‰
‡
Fig. 50
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