70
Performance data of eyepieces
Our product range includes the following
eyepieces for the Leica DM IL:
Eyepieces for viewing with DM ILB or DM ILT
tubes
Magnification/ Eyepiece
Field of view port +)
10 x/18
10 x/18 M
10 x/20
10 x/20 M
15 x/14
Eyepiece tube diameter: 23.2 mm
Eyepieces for viewing with tubes from the
DM L range
Leica Magnification/ Eyepiece
eyepiece type Field of view port +)
HC PLAN 10 x/20 M
HC PLAN 10 x/20
HC PLAN 12.5 x/16 M
HC PLAN 10 x/20 MF
Eyepiece tube diameter: 30 mm
+) = with detachable or fold-back glare protection, for
use with or without glasses
M = adjustable eyelens (dioptre compensation) and
mount for graticules of 19 mm or 26 mm for HC
eyepieces
MF = with illuminated graticule
The eyepiece type LEITZ PERIPLAN
®
must not be used!
Eyepieces of the earlier type L PLAN may only be used with
earlier-type tubes (before about 1998) without engraving HC!
Eyepiece field of view number
For a certain microscope configuration a certain
eyepiece field of view number must not be
exceeded (see below), e. g. 20. If the maximum
field of view is exceeded, this may result in a
disturbing loss of definition or vignetting at the
edge of the image, → following pages!
The eyepiece field of view (fov) designates the
diameter of the intermediate image in the eye-
piece in mm, i. e. the diameter of the circular
diaphragm which limits the image format and
which lies within the eyepiece.
This fov is indicated on the eyepiece after the
magnification, e. g. 10x/20.
A maximum fov of 20 is recommended for the
Leica DM IL microscope.
The maximum admissible eyepiece field of view
number of a certain configuration is derived
from the following instrument data:
Field performance of objectives see below
Field performance
of intermediate module(s) see below
Field of view number of tubes → p. 74
Condenser characteristics → p. 75
The decisive value is always the smallest.
If e. g. the intermediate modules (see below)
only allow the field of view number 20 while the
objectives and tube allow 25, the maximum
admissible fov number for the eyepiece is 20.
Eyepieces with a fov number of 25 can cause
vignetting. In detail, the following applies:
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