Instruction manual

17
Travel Scope Specifications
Model # 21035
Travel Scope 70
Model # 21038
Travel Scope 50
Optical Design Refractor
Refractor
Aperture 70mm (2.8")
50mm (2.0”)
Focal Length 400mm
360mm
Focal Ratio f/5.7
f/7.2
Optical Coatings Fully Coated
Fully Coated
Finderscope 5x24
2x20
Diagonal Erect Image - 45° 1.25"
Erect Image .96” to
1.25” - 45°
Eyepieces 20mm 1.25" (20x)
20mm 1.25” (18x)
10mm 1.25" (40x)
8mm 1.25” (45x)
Barlow Lens – 3x 1.25” n/a
Yes (54x & 135x)
Apparent Field of View 20mm @ 50°
20mm @ 32°
10mm @ 50°
8mm @ 30°
Angular Field of View 20mm @ 2.5°
20mm @ 1.6°
10mm @ 1.3°
8mm @ 0.7°
Linear Field of View -- ft/1000yards / 20mm @ 131/44
20mm @ 84/28
m/1000meters 10mm @ 67/22
8mm @ 37/13
Near Focus w/20mm Eyepiece 19' (5.8m)
15’ (4.5m)
Mount Altazimuth (Photo
Tripod)
Altazimuth (Photo
Tripod)
Altitude Locking Knob Yes
Yes
Azimuth Locking Knob No
No
CD-ROM “The SkyX” Yes
Yes
Highest Useful Magnification 168x
120x
Limiting Stellar Magnitude 11.7
11.1
Resolution -- Raleigh (arc seconds) 1.98
2.66
Resolution -- Dawes Limit " " 1.66
2.28
Light Gathering Power 100x
51x
Optical Tube Length 17" (43cm)
12” (30cm)
Telescope Weight 3.3# (1.5Kg)
2.2# (1.0Kg)
Note: Specifications are subject to change without notice or obligation.