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Design:
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Kriege-style Truss Tube Newtonian
Reflector
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Limiting Stellar
Mag.:
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16.5*
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Rayleigh Resolution Limit:
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0.27 arcseconds*
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Total Weight:
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To Be Determined. (~150 lbs)
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Primary Mirror:
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20 inch Galaxy Optics "Premium
Select" See
About The Optics for
more information.
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Coating:
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96% Reflectivity Enhanced Aluminum,
3 Dielectric Layers over Al with a top sealing layer of pure quartz.
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Focal Ratio:
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f/5
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Focal Length:
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100 inches
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Mirror Cell:
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18 point flotation system with open
tailgate for uniform support and maximum air circulation for rapid temperature
equalizing.
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Secondary Mirror:
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3.1 inch m.a. with 98% Reflectivity
Enhanced Aluminum, 5 Dielectric Layers over Al with a top sealing layer of pure
quartz.
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Secondary Spider/Holder:
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Protostar spider with 4 ultra-thin
stainless steel vanes and constant tension clutch plate collimation,
NO LOCKING SCREWS!
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Focuser:
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2 inch JMI DX-1 Next Generation
Focuser (NGF). Dual Speed, low profile, high pressure steel on steel
Crayford drive design.
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Secondary Cage:
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25.5 inch diameter, 12 inch
height. Weight To Be Determined. (~12 lbs)
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Truss Tube:
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8-1.25 inch diameter poles.
Length To Be Determined. (~5.8 feet)
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Mirror Box:
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11 Ply Hardwood Core, Hardwood
Veneer Baltic Birch Plywood. Final dimensions To Be Determined. (~
29 x 29 x 25 inches)
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Altitude Bearings:
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26 inch diameter (1/2 circle only)
cast Aluminum bearings. Ebony Star Formica with Virgin Teflon pads at 15
psi
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Azimuth Bearing:
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Glassboard with Virgin Teflon pads
at 12 psi
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Digital Setting Circles:
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Sky Commander XP-4 with 4000 step
encoders
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Visual Finders:
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Telrad and a Meade 8x50mm S-T
Viewfinder (best balance between light grasp, FOV and weight)
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* = Under Ideal Skies
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