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Comparison Arsenal 3x25 NB26-0325 vs Konus Opera-43

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Arsenal 3x25 NB26-0325
Konus Opera-43
Arsenal 3x25 NB26-0325Konus Opera-43
from 650 ₴
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Product typebinocularsbinoculars
Magnification3 x3 x
Optical characteristics
Field of view 1 km away127 m127 m
Twilight factor8.78.7
Relative brightness69.469.4
Diopter adjustment
Diopter correction range±5 D
Design
Lens diameter25 mm25 mm
Exit pupil diameter8.33 mm8.33 mm
Focuscentralcentral
PrismRoofRoof
Interpupillary adjustment
General
Case
Weight210 g210 g
Color
Added to E-Catalogjanuary 2015september 2014

Diopter adjustment

The presence in binoculars / monoculars of the function of diopter correction. This feature will be very useful if you wear glasses due to nearsightedness or farsightedness. By setting the required number of "plus" or "minus" diopters on the adjustment scale, you can look into the eyepiece with the naked eye and see a clear picture — the optics of the device will provide the necessary correction. It is much more convenient than watching through glasses. However one should not forget that the correction range (see below) is usually small, and in case of serious visual impairments, the capabilities of the binoculars may not be enough; but such situations are still quite rare. In binoculars (see "Type"), this adjustment is usually carried out for each eyepiece separately, because The diopters required for each eye may also be different. Features of the correction control depend on the type of focus (see below). With separate focus, each eyepiece is adjusted with its own regulator, with the central one of the halves (usually the left) is regulated using a common focus handwheel, and the second with a separate knob on the eyepiece (although here there are separate regulators on both eyepieces).

Diopter correction range

The range of values in which diopter adjustment can be made (see above). If you wear glasses with diopters, but plan to look through binoculars / monoculars without them, you should choose a model whose range would correspond to the characteristics of the glasses (or at least be as close as possible to them).
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