Features
Dimensions: 154x130x50mm
Output pupil: 5.25 mm
Brightness index: 27.6
Twilight index: 18.3
Field of view vision : 109 m at 1000 m distance
Nearest observation point: 5 m
Waterproof and fogproof: nitrogen purge
Lens treatment: FMC (Full Multi coated)
Prism: BaK4 Silver
Glass-fibre reinforced ABS plastic frame
Image quality 1
When light passes through binoculars, some of its intensity is lost. Each glass element absorbs some of the light, a few percent. But with 10 optical elements, the amount absorbed is significant. It is therefore necessary to apply a treatment to each element to reduce the amount absorbed. But each treatment has a cost. And the more effective the treatment, the more expensive it is. Design is therefore a delicate balance between efficiency and price.
Image quality 2
The binoculars are equipped with a BaK4 prism with silver coating and lenses with FMC coating: Full multi-coated, all surfaces are multi-coated for optimum light transmission.
These 2 elements provide 78% light transmission, excellent contrast and color rendition during the day, and excellent brightness at dusk. The prism provides excellent sharpness for observing details.
Waterproofing
Nitrogen-filled binoculars for waterproofing and internal anti-fogging. Resistant to immersion to a depth of 1 meter for 15 minutes.
Brightness and use
The 500 8x42 binoculars are ideal for birdwatching and observing animals on the move, thanks to their wide field of view from vision.
They are also ideal for stalking and hunting, thanks to their excellent twilight illumination. Finally, if you want to enjoy long observation sessions in comfort, these binoculars are ideal, thanks to their x8 magnification that prevents shaking.
Output pupil
The human pupil varies from 2 to 3 mm during the day, 4 to 5 mm at dusk and 6 to 7 mm in the dark. So it's important to choose binoculars with an exit pupil that covers your entire pupil, to exploit their full brightness to suit your needs. 8x42 binoculars have an exit pupil of 5.25 mm , making them ideal for twilight conditions, even better than 10x42 binoculars with an exit pupil of 4.2 mm.
SHARPNESS ADJUSTMENT FOR SPECTACLE WEARERS
Eyecups can be retracted to suit spectacle wearers.
When not wearing glasses, extend the eyecups as far as possible by turning them. With glasses, position the eyecups in the screwed position against the body of the binoculars.
To see the object or animal you are observing clearly, use the central adjustment knob, turning it to the left or right until you obtain a sharp image.
ADJUSTING THE VISION DISTANCE BETWEEN THE TWO EYES
To correct the difference in vision between the 2 eyes:
Close the right eye and use the central focusing wheel to focus on an object some 50 metres away. Once the object is in focus, close the other eye and repeat the operation, this time focusing with the ring near the right eyecup. The deviation is now corrected. There's no need to adjust this ring again in the future.
