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ENGLISH I 11
TECHNICAL SPECIFICATIONS Model # 22028 Travel Scope 70
Optical Design Refractor
Aperture 70mm (2.8")
Focal Length 400mm
Focal Ratio f/5.7
Optical Coatings Fully Coated
Finderscope 5x24
Diagonal Erect Image - 45° 1.25"
Eyepieces 20mm 1.25" (20x)
10mm 1.25" (40x)
Apparent Field of View 20mm @ 50°
10mm @ 50°
Angular Field of View 20mm @ 2.5°
10mm @ 1.3°
Linear Field of View –
ft/1000 yards 20mm @ 131/44
m/1000 meters 10mm @ 67/22
Near Focus w/20 mm Eyepiece 19’ (5.8 m)
Mount Altazimuth (Photo Tripod)
Altitude Locking Knob Yes
Azimuth Locking Knob No
Astronomy Software Download Yes
Highest Useful Magnifi cation 168x
Limiting Stellar Magnitude 11.7
Resolution -- Raleigh (arc seconds) 1.98
Resolution -- Dawes Limit “ “ 1.66
Light Gathering Power 100x
Optical Tube Length 431.8mm (17”)
Telescope Weight 1.5lb (.68 kg)
Note: Specifi cations are subject to change without notice or obligation.
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