Travel scope specifications – Celestron 21035 User Manual
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Travel Scope Specifications
Model # 21035
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/1000yards /
20mm @ 131/44
m/1000meters
10mm @ 67/22
Near Focus w/20mm Eyepiece
19' (5.8m)
Mount
Altazimuth (Photo Tripod)
Altitude Locking Knob
Yes
Azimuth Locking Knob
No
Highest Useful Magnification
168x
Limiting Stellar Magnitude
11.7
Resolution -- Raleigh (arc seconds)
1.98
Resolution -- Dawes Limit " "
1.66
Light Gathering Power
100x
Optical Tube Length
17" (43cm)
Telescope Weight
3.3# (1.5Kg)
Note: Specifications are subject to change without notice or obligation.