Binoculars 9X63 Rti Hide

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RTI
€311.90
Chasseur.com price 2020
Save €61.40
250.50
Until 30/04/2026 included
Recommended retail price : €311.90
Shipping within 24h
Shipping within 24h
Alma
Pay it in 3 or 4 interest-free payments
20 days for returns
20 days for returns
Models & specificities Descriptive Reviews A question Besoin de formation
Models & specificities
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Reference
Price inc VAT
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Magnification/lens
Field at 1000m
Exit pupil (mm)
Weight (g)
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Price inc VAT
OP1942
€311.90
€250.50 Until 30/04/2026 included
Expédition sous 24h
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24h
9x63
96
7
1360
Expédition sous 24h
Shipped within
24h
€311.90
€250.50 Until 30/04/2026 included
Models & specificities Descriptive Reviews A question Besoin de formation
Descriptive
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Roof-prism binoculars with large aperture (63 mm) for observation in low light.

Specifically designed for hide (gabion) hunting and wildlife observation.

Features :
• Twilight factor : 23. 8
• Cemented multi-coating optical treatment
• Field of view : 5. 5° i.e. 96 m at 1000 m
• Adjustment by central wheel and right eye via rotating eyepiece.
• Green shockproof rubber coating.
• Protective eyepiece and objective covers.
• Fold-down rubber eyecups
• 1/4' photo-thread screw for tripod mounting.
• Cordura case, carrying strap and optical cleaning cloth

Calculation of the twilight factor : square root of the product of magnification and diameter. For 8x42 binoculars, this is therefore the square root of 8x42, i.e. the square root of 336 = 18,3.

The higher the twilight factor, the better. Indeed, the higher this factor, the more details will be visible. There is also another criterion for binocular clarity: brightness.

Brightness is obtained by squaring the diameter of the exit pupil (42/8=5,25 mm), that is 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 it is below 15, the binoculars are mainly suitable for daytime use.

Binoculars displaying a twilight factor above 25 can be called night binoculars. However, the limit is blurred. A high twilight factor combined with low brightness (12x40 binoculars have a twilight factor of 21,9 but a brightness of 11,1) will be difficult to handle.

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