logo_sa_vertical Go to website
www.sport-attitude.com
logo_armsco_vertical Go to website
www.armsco.fr
logo_fabarm_vertical Go to website
www.fabarm.fr
cat. Chasse 2019 p.306

Folding binoculars RTI 10 x 25

RTI Optics RTI Optics

Folding binoculars RTI 10 x 25

Item number : OP175

Item number Designation Category Weight (g) Magnification Min Objectif Diam. (mm) Color MSRP Stock
Item number OP175 Designation Folding binoculars RTI 10 x 25 Category Free sale Weight (g) 320 Magnification Min 10x Objectif Diam. (mm) 25 mm Color Black MSRP 42 € incl. tax
Disponible

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!

  • Excellent image quality, long service life and very good reliability even in difficult conditions.
  • The lenses and prisms are made with very high quality glass, multilayer treated.
  • Reduced weight and pleasant, ergonomics studied for a fatigue-free observation, folding eyecups.
  • Field at 1000 m: 101 m.
  • Output pupillary diameter: 2.5 mm.
  • Type of prism: roof.
  • Twilight index: 15.8 - Brightness: 6.25.
  • Supplied with Cordura cover.

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.

Context : 10 x 25 binoculars, hiking binoculars, binoculars for kids, pocket binoculars, binoculars to slide in a backpack.
In France products of categories A, B, C or D are subject to rules of purchase, port, transport and detention. For more details please consult the link below.
Classification of weapons according to the French Internal Security Code

Associated products


Umbrella seat cane

GASTROCK   GASTROCK
Umbrella seat cane
Replenishment in progress
175.00 € TTC
Ref. A57002

Chambord Pro II Khaki Boots

Aigle   Aigle
Chambord Pro II Khaki Boots
From
72.00 € TTC
Ref. VCA14039 / VCA14040 / VCA14041 / VCA14042 / VCA14043 ...
The recommended retail prices are listed as a guide..
Pictures are not contractual. Photos of product may be different with the final products.