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AstroMaster Specifications
AstroMaster Specifications
21064
AM 90 EQ
Refractor
90mm (3.5")
1000mm
f/11
n/a
Multi-coated
Star Pointer
Erect Image
20mm (50x)
31045
AM 130 EQ
Optical Design
Aperture
Focal Length
Focal Ratio
Secondary Mirror Obstruction -- Dia. - Area
Optical Coatings
Finderscope
Diagonal 1.25"
Eyepieces 1.25"
Apparent FOV -- 20mm @ 50°
-- 10mm @ 40°
Angular Field of View w/standard eyepiece
Linear FOV w/standard eyepiece -ft/1000yds
10mm (100x)
1.0°
53
Newtonian
130mm (5")
650mm
f/5
31% - 10%
Fully coated
Star Pointer
n/a
20mm Erect
Image (33x)
10mm (65x)
1.5°
79
Mount
RA & DEC Setting Circles
RA & DEC Slow-Motion Cables
Tripod Leg diameter 1.25"
CD-ROM "The Sky" Level 1
Equatorial CG3
yes
yes
yes
yes
Equatorial CG3
yes
yes
yes
yes
Highest Useful Magnification
Limiting Stellar Magnitude
Resolution -- Raleigh (arc seconds)
Resolution -- Dawes Limit " "
Light Gathering Power
213x
12.3
1.54
1.29
165x
306x
13.1
1.06
0.89
345x
Optical Tube Length
Telescope Weight
36" (91cm)
27 # (12.2kg)
24" (61cm)
28 # (12.7kg)
Note: Specifications are subject to change
without notice or obligation
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