Leica DM R Serie Mode D'emploi page 46

Adaption of objectives with RMS thread (Royal
Microscopical Society W 0.8x 1/36''): objectives
with this classical thread size can only be used
on all nosepieces under certain circumstances
and together with the spacer ring M32/RMS or
M25/RMS (Fig. 39):
Objectives with tube length 160 mm are not
adaptable at all due to optical reasons. These
are identified by the engraving 160 and the mis-
sing multiplication sign after the magnification,
e.g. PL FLUOTAR 40/0.70. In the case of incident
light objectives whose engraved code number
has a 9 in the third position from the left, e.g.
559 678 or 569 678, the engraved magnification
must be multiplied by 0.8, as these objectives
are designed for incident light microscopes with
tube lens focal length 250 mm. The aperture and
the working distance are not affected.
Fig. 39 Objective spacer rings (adapters)
25/RMS
32/RMS
46
Code numbers with a 6 or 7 in the third position,
on the hand, indicate objectives for tube lens
focal length 200 mm which is used without
exception in your microscope so that the en-
graved magnification applies.
!
When using objective spacer rings:
Objective spacer rings are manufactured with a
thickness tolerance of about 1/500 mm to ensure
the parfocality of the objectives. They must
therefore be treated with extreme care. When
adapting objectives with RMS thread it may be
necessary to shorten the upper edge of the
objective collar by about 1.5 mm (this is done at
our factory) as otherwise the objective cannot
be screwed on properly, so that parfocality is
not guaranteed and the objective collar cannot
be rotated. Please consult our agency in this
case.
32/25
Caution: