Monoculars Telescope astronomical binoculars adults high power for indoor and outdoor

Colour Name:
Blue

Adjustable spiral eyepatch of eyepiece can transform the distance of exit pupil and suits for people who wear glasses,With a hanging rope, easy to carry,It's for boating, bird watching, auto racing, horse racing, etc.
Eyepiece diameter 24.5
Objective lens diameter 42
Field of view 7.4
Eye Relief : 17mm
Exit Pupil Diameter :`3.7mm
Nearest distance 3.6m/11.8ft
Prism: k9
Product color: blue
Product size: 148X130X53
Product weight: 813g + 208g
BKA4 prism: The spot light transmittance is high, the picture is transparent, clear and bright.
Wide-angle design: Built-in wide-angle design for wider viewing area
Ultra-high transmittance, double-sided broadband coating, average light transmittance in the spectral range from 400 nm to 600 nm exceeds 99.5%