Upgraded FBMC multi-layer coatings including anti-reflective coatings on cemented surfaces, achieving reflectance rmax <0.15% (420-680nm)
Light transmission rate
92%
High brightness coating grades
BSC-8888/DC/PC/WR, BSC-5, BSC-7
Dual imported ED (Extra-low Dispersion) glass lenses
APO (Apochromatic) optical structure with dual Hoya ED lenses
Lanthanum glass elements (+4 lanthanide series lenses)
Retinal lens group with advanced chromatic aberration correction
Strehl ratio > 0.89 ensuring high image clarity and minimal chromatic aberration
Optical glass meets international environmental standards, free of lead and arsenic
BSR-9-UHD ultra-high definition standard (resolution <175")
Additional details
Full multi-layer dielectric coatings
DC dielectric, PC phase coating, WR water-repellent coating
Coma and spherical aberration minimized (Coma
0.2019, Spherical: -0.1142)
Magnesium alloy integrated body for enhanced stability and durability
Additional details
BSW-7 waterproof rating
waterproof up to 1 meter for 30 minutes
Operating temperature range
-20°C to 50°C
Shock-resistant and weatherproof for outdoor use in rain, fog, sea spray, and frost
X-type pressure-relief shoulder strap for comfortable long-term wear
Detachable eyecups with 5-level adjustable eye relief for different eye positions
Titanium-colored metal focus wheel with 1.5 turns for full-range focusing
Detachable objective lens caps integrated with rubber for protection and convenience
Hidden tripod mount for easy attachment
MA4 upgraded smartphone adapter for easy photo and video capture
Dual aperture options (42mm and 50mm) to suit different viewing needs
Anti-slip dragon scale pattern design on the body for secure grip with or without gloves
Large 27mm eyepieces for comfortable viewing and bright images
Additional details
Dimensions & Weight (Example
Qinglong 8x42):
Size
157 x 133 x 60 mm
Weight
925 g
Central focusing with medium adjustment speed
Additional details
Eye relief
18 mm
Close focus distance
2 m
Exit pupil diameter
5.2 mm
BOSMA
Founded in the millennium year, BOSMA is dedicated to delivering exceptional products and services that enrich the art of viewing and the joy of life. From cosmic stars to microscopic worlds, from bird songs to mountain clouds, from daytime meteors to nocturnal wildlife, BOSMA transforms human visual blind spots into gateways to a wondrous world.
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