User Manual

Operation Instructions
The DOCTER
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Binoculars acquired by you is a leading product of fine-mechanical
precision. It is a product with highest requirements of the optical performance after
latest development of the optics calculation and optics technology concerns with solid
processing. All binoculars of this series are implemented as spectacle wearer models
and they are waterproof.
Technical data
DOCTER 8x21 10x25
Magnification 8x 10x
Entrance pupil diameter 21 mm 25 mm
Field of view at 1000 m 131 m 105 m
Close distance 2,0 m 3,0 m
Exit pupil diameter 2,6 mm 2,5 mm
Eye relief 15 mm 15 mm
Dioptre adjustment range ±3,0 dpt ±3,0 dpt
Range of interpupillary
distance
34– 74 mm 34 – 74 mm
Water tightness 1 m
Twilight number 12,9 15,8
Length 105 mm 120 mm
Width 105 mm 105 mm
Mass 355 g 375 g
Eye distance
To reach a great and contrast panorama the binoculars have to be adjusted to the
different eye distance of different users. This adjustment happens by bending the
central hinge (1) until both fields of vision of the right-hand and left-hand telescope
completely coincide during observing any object .
Focusing and defective sight assistance
Observe any object with the left eye trough the left ocular and turn the mid-wheel (2)
till the object is clear and high contrast.
A possible defect of the eyes of ± 3,0 dioptres can be compensated by turning the
dioptre adjustment (3). Thereby observe the same object with the right eye and turn
the diopter setting wheel till the object impression is clear and high in contrast.