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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