Optical Accessories - Leica M420 Instruction Manual

The requirements
Because the working distance, the total magnification and the
field of view must all be adapted to the application, the user needs
to be able to choose from a range of high-quality objectives and
eyepieces.
Additional objectives, with bayonet
mount: 0.5× and 2.0× for the Macro-
zoom, 0.4× and 2.0× for the Apozoom,
and rotatable quarter-wave plate.
1:5 Macrozoom and 1:6 Apozoom
objectives
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Wide-field eyepieces for
spectacle wearers, 10×/21, 16×/14,
25×/9.5, 40×/6
The Macrozoom- and Apozoom objectives can
be combined with the coaxial incident-light
housing, with a quarter-wave plate, and with
additional objectives.
1:5 Macrozoom objective
The Macrozoom objective is inscribed with the
magnification range 6.3× to 32×. This means
that, if 10× eyepieces are used in the binocular
tube (which introduces a tube factor of 1.25×),
objects can be observed at constant sharpness
over a zoom range from 7.9× to 40×. The optical
components are computed to give wide aperture
and good resolution, multiple-coated to ensure
high image contrast, and well corrected to
produce image fidelity and crispness.
The 0.5× and 2.0× additional objectives can be
used with the Macrozoom objective.

Optical accessories

1:6 Apozoom objective
The intrinsic zoom range of the Apozoom objec-
tive is from 5.8× to 35×, i.e. the zoom range down
the binocular tube if 10× eyepieces are used is
7.3× to 43.8×.
Because of its excellent chromatic correction for
three spectral colours and for all intermediate
tones, the Apozoom is the objective of choice if
requirements stipulate maximum sharpness,
highest resolution and maximum contrast rendi-
tion, even for the finest structures.
The 0.4× and 2.0× additional objectives used
with the Apozoom objective have been specially
designed for it.
Wide-field eyepieces for spectacle wearers,
distortion-free
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The basic outfits include distortion-free, wide-
field eyepieces (10×/21B) for spectacle wearers,
with excellent imaging characteristics. Because
of their long exit pupil distance of 22mm (at this
distance the observer sees the full field of view)
these eyepieces are usable either with or with-
out spectacles. If you work without spectacles
and want closer contact to the eyepieces or to
the eyecups, you can displace the height of the
eyecup above the eyelens within the range from
4mm to 20mm.
Intrinsic magnifications
10×, 16×, 25× and 40×
Usable with or without spectacles
Adjustable eyecups
Diopter setting adjustable from +5 to –5
Accepting graticules for measuring
and for photography