Meade Instruments Starfinder 12.5 User Manual
Page 10

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Specifications and Features: Meade Starfinder
™
Dobsonian Telescopes
TELESCOPE:
Starfinder
Starfinder
Starfinder
Starfinder
Dobsonian 6
Dobsonian 8
Dobsonian 10
Dobsonian 12.5
Optical Design
Newtonian Reflector
Newtonian Reflector
Newtonian Reflector
Newtonian Reflector
Diameter/Clear Aperture
152mm (6")
203mm (8")
254mm (10")
318mm (12.5")
Primary &
Grade-A Pyrex
®
glass,
Grade-A Pyrex
®
glass,
Grade-A Pyrex
®
glass,
Grade-A Pyrex
®
glass,
Secondary Mirrors
fine annealed
fine annealed
fine annealed
fine annealed
Secondary Mirror Support
4-vane; steel
4-vane; steel
4-vane; steel
4-vane; steel
Focal Length
1220mm
1220mm
1140mm
1525mm
Focal Ratio
f/8
f/6
f/4.5
f/4.8
Resolving Power (arc secs.)
0.74
0.56
0.45
0.36
Limiting Visual Magnitude
13.5
14.0
14.5
15.0
Limiting Photographic Magnitude
16.0
16.5
17.0
17.4
Image Scale
1.18°/inch
1.18°/inch
1.26°/inch
0.95°/inch
Maximum Practical Visual Power
400X
500X
600X
600X
35mm Angular Film Coverage
1.11° x 1.58°
1.11° x 1.58°
1.19° x 1.70°
0.89° x 1.27°
Optical Tube
7.6" dia. x 48" long-
9.6" dia. x 48" long-
12.7" dia. x 45" long
15.1" x 58" long
spiral-wound Sonotube
spiral-wound Sonotube
spiral-wound Sonotube
spiral-wound Sonotube
Secondary Mirror Minor Axis
1.18"
1.83"
2.37"
2.60"
Secondary Mirror Obstruction
3.9%
3.6%
5.6%
4.3%
Dobsonian Mounting
Base Diameter
13.75"
17.1"
22.2"
26.75"
Mount Dimensions (approx.) 12" square x 19" high
16" square x 17" high
21" square x 20" high
25" square x 22 " high
Materials-- ----------------All models: thermally-fused Melamine
®
with industrial particle board core.---------------
Bearings: Altitude
Nylon
Nylon
Nylon
Nylon
Azimuth
Teflon
Teflon
Teflon
Teflon
Net Weights: Optical Tube
20 lbs.
26 lbs.
30 lbs.
55 lbs.
Mounting
14 lbs.
18 lbs.
32 lbs.
41 lbs.
Shipping Weight (approx.)
38 lbs.
49 lbs.
68 lbs.
106 lbs