Page 1
Instruction Manual
The binoculars have 42mm in aperture and only 2.1x
magnification providing an exit pupil of 19mm.
Considering a human has (at most) 7mm exit pupil
there is some light loss. True, but this is the tradeoff in the optical construction to get such wide fields
of view.
Figure 1. Features.
Figure 2. Adjusting the interpupillary distance.
Figure 3. Eyepiece adjustment (focusing).
Figure 4. Binoculars with L-Bracket and tripod (both not
supplied).
Congratulations on the purchase of Omegon® 2.1x42
wide-field binoculars for star field observing. These
special binoculars provide 26 degrees of field of view,
which allow seeing huge portions of the night sky. This is
great to identify constellations, and effectively increase
by a few magnitudes what the naked eye cannot see.
1.1 What is included?
1- Binoculars 2.1x42; 2- Strap;
3- Pouch; 4- Cleaning cloth.
1.2. Features (fig. 1)
1- Individual eyepiece adjustment;
2- ¼”-20 threads for tripod L-Bracket;
3- Full aperture 42mm diameter fully multi-coated
objective (and eyepiece) lenses;
4- Light delete threads.
2. What to do before starting to use your new
binoculars? 2.1. Adjust the interpupillary distance. Each
person has a different interpupillary distance. This is the
distance between both eyes. The binocular needs to be
adjusted before use. Adjustment ranges between 5575mm. To adjust move the two lens barrels
further/closer apart. The correct interpupillary distance
is the one that provides light entering simultaneously to
both eyes, it also provides comfortable viewing and an
over-imposed image of the observed object with both
eyes.
2.2. Focusing. The eyepieces can be individually
adjusted. Rack the eyepieces (both) all the way out.
During the day, look for a target far away and start by
slowly racking-in to achieve focus (the image starts to
form). Adjust each eyepiece to each eye individually. For
night use small adjustments may be required.
2.3. Using a tripod. The ¼”-20 thread can be used to
attach to a tripod (with an L-bracket adapter) or any
other equipment with ¼”-20 threads.
3. Specifications.
Eye relief 9mm Exit Pupil 19mm
FOV 26 degrees Close Focus 1m
Apparent visual mag. 9.88
Weight 375g
Art. Nr. 50354 English Version 07.2017 REV A
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