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Keevin 8x42 & 10x42 binoculars

HELIOS HELIOS

Keevin 8x42 & 10x42 binoculars

MSRP From : 175.00 € incl. tax
10x42 binoculars
Item number : XOPR15104
MSRP From : 170.00 € incl. tax
8x42 binoculars
Item number : XOPR15103
Item number Designation Category Length (cm) Width (cm) Weight (g) Magnification Min Objectif Diam. (mm) Color MSRP Stock
XOPR15104 10x42 binoculars Free sale 16 11.5 732 10x 42 mm Black 175 € incl. tax
Indisponible
XOPR15103 8x42 binoculars Free sale 16 11.5 732 8x 42 mm Black 170 € incl. tax
Indisponible

The available products can be ordered by your gunsmith who will be delivered in 24 / 48h, unavailable products are being replenished, but your gunsmith may have in stock, ask!

Binoculars hunting, observation and hiking.

All terrain binoculars with shockproof rubber coating.

Optics treated anti-reflective multilayer.

Twist system eyepieces adapted to eyeglass wearers.

Output pupillary diameter: 4.2 mm for 10x & 5.25 for 8x

  • (The larger the diameter, the more comfortable the observation in low light will be)
twilight index: 20. 5 - brightness: 27. 6 (for 10x)

Supplied with case, strap and optical cloth.

Calculation of the twilight index: square root of the product of magnification and diameter. For 8x42 binoculars, this is the root of 8x42, that is, the root of 336 = 18.3.

The higher the crepuscular index, the better. Indeed, the higher this index is, the more we will see details. There is another criterion for binocular clarity: brightness.

The brightness is obtained by squaring the diameter of the exit pupil (42/8 = 5.25 mm), that is to say by multiplying it by itself. In our example, the relative brightness is: 5.25 x 5.25 = 27.6. The higher this value, the better. When less than 15, binoculars are especially suitable for daytime use.

Binoculars with a twilight index greater than 25 may be called night binoculars. The limit is however fuzzy. A high crepuscular index combined with low brightness (12x40 binoculars have a twilight index of 21.9 but a brightness of 11.1) will be difficult to handle.

Twilight index: 20. 5 - Brightness: 27. 6
Context : high magnification, long view, birds, game, wild boar, lookout, BlackFriday ...
The recommended retail prices are listed as a guide..
Pictures are not contractual. Photos of product may be different with the final products.