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Verfügbare Sprachen
Verfügbare Sprachen
Adjustment of interocular distance
In order to obtain a wide circular field of vision, the binocular telescope must
be adjusted to the interocular distance of the various users. This correc-
tion is made by bending the central hinge until the fields of vision of the
right-hand and left-hand telescope completely coincide. The scale (1 fig. 1)
on the hinge indicates the setting of the interocular distances valid for the
user from now on. The engraving marks the interocular distance of 60 mm,
65 mm and 70 mm.
Distance focusing and compensation for errors
The 7x40 / 10x42 B/GA is a binocular telescope with individual eyepiece
focusing. When observing objects at a specitled distance, it is necessary to
adjust the desired image by focusing using the eyepiece. First of all, turn
both eyepieces on the knurled rings provided for them in the „+" direction.
Adjustment is carried out in two stages, separately for the right and left eye:
aim at the object to be observed:
•
Then close the right eye and by turning the knurled ring on the left
eyepiece adjust to maximum definition for the left eye.
•
Then close the left eye and aim at the same object. Using the knurled
ring on the right eyepiece adjust to maximum definition for the right eye.
In this way distance and compensation for errors (observation without
spectacles) are adjusted correctly at the same time. When observing
objects repeatedly at the same range of distance, the correct setting can be
predetermined using the markings on the eyepieces.
Adaptation of eyecups
The 7x40 / 10x42 B/GA has specially designed eyepieces which enable
observation with spectacles to be carried out and thus make use of the
full visual field of the instrument. For this purpose the eyecups are turned
outwards. The eye cups are normally used flat.
Cleaning
The external optical parts should first be cleaned of dirt with a second clean,
dry paint brush. Further cleaning can be carried out with a flannel cloth and
light circular movements from the centre to the edge (blow if necessary).
Take care that the optical parts are not smudged with oil or grease or
touched by a finger. Excessively strong rubbing while cleaning or on optical
parts can destroy the transparent coating (T-Coating).
For cleaning internal optical parts as well as for replacing sub-assemblies
and spare parts, the instrument must be sent into a contractual repair shop.
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