10
Specifications
6" Ritchey-Chrétien
Aperture:
6" (150mm)
Focal Length
1370 mm
Focal Ratio
f/9
Mirror figure:
Hyperbolic
Mirror material
BK-7
Mirror Coating
Enhanced, 94%-96% reflectivity with SiO2 overcoat
Optical Tube
Steel
Focuser
2" Crayford, dual speed (10:1)
Drawtube travel:
34mm
Backfocus distance:
240.1mm from rear cell; 151.3mm from 2” collar on drawtube
Central obstruction:
72mm
Tube Length:
486mm
Tube Diameter:
191mm
Bottom mounting bar:
V-style (narrow)
Top mounting bar:
None
Cooling fans:
None
Weight:
12.1 lbs.
8" Ritchey-Chrétien
Aperture:
8" (200mm)
Focal length:
1600mm
Focal ratio:
f/8
Mirror figure:
Hyperbolic
Mirror material:
Fused quartz
Mirror Coating:
Enhanced, 94%-96% reflectivity with SiO2 overcoat
Optical Tube:
Steel
Focuser:
2" Linear-bearing Crayford, dual speed (10:1)
Drawtube travel:
50mm
Backfocus distance:
238.1mm from rear cell; 140.7mm from 2" collar on drawtube
Central obstruction:
95mm
Tube Length:
559mm
Tube Diameter:
232mm
Bottom mounting bar:
L-style (wide)
Top mounting bar:
V-style (narrow), slotted
Cooling fans:
None
Weight:
18.5 lbs.
