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National Geographic 90/900 Refractor Telescope

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National Geographic 90/900 Refractor Telescope Details

National Geographic 90/900 Refractor TelescopeSCOPE OF DELIVERY OTA Mount Aluminium tripod Eyepieces 31.7mm (1.25"): H-20mm, H-12mm, SR-4mm 3x Barlow Lens Moon filter LED viewfinder Star map
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National Geographic 90/900 Refractor Telescope Specifications

ManufacturerNational Geographic
Telescopes seriesNational Geographic Refractors
Made in-
In production sinceNo
Warranty5 years
Optical design of telescope Refracting telescope
Lowest (useful) magnification. 12.8x
Highest (useful) magnification. 180x
Field of view - FOV... 0m/1000m
Apperent FOV (angular).
Optical tube size - diameterNo
Optical tube lengthNo
Optical tube weightNo
Aperture. 90mm
Focal length. 900mm
Focal ratio. 10
Eyepiece 1 - Focal Length20
Eyepiece 1 . magnification45
Eyepiece 2 - Focal Length12
Eyepiece 2 . magnification75
Eyepiece 3 - Focal Length4
Eyepiece 3 . magnification225
Light-gathering power. 165x
Limitting stellar magnitude. 11.7
Rayleigh Resolution. 1.5Arc seconds
Dawes Resolution. 1.2Arc seconds
Image capturingNo
Photo adapterNo
Mount type of buildEQ-3
Tripod compliantYes
Type of tripodAdjustable
Tripod materialAluminium
Min. height.0mm
Max. height.0mm
Software for Stellar NavigationNo
GoTo Telescope Control No
GoTo Telecope Language-
Telescope GoTo control interfaces-
Telescope Alignment method -
Integrated GPSNo
Tracking No
Track rate -
Track mode -
Telescope Guiding No
Slow motion controller Yes
Slew Speed Manual
Com. Port-
Remote Hand Control-
Power Supply Unit-
Energy consumption.0W
Lens coatings Fully Multicoated
Type of FocuserNo
Eyepiece barrel size1.25'' / 31.75 mm
Eyepiece angle90°
Barlow diverging lens 3x
Total gear weight.9.44kg
Finder - Scope Red Dot
Recommended forBeginners
Suitable for observingMoon, Planets


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