The OA-4.0
The original OA-Series Telescope and a superb instrument for city observers and moderately
light polluted locations. Fits into the back of my Geo Metro with room to spare, and most people
can do their observing sitting comfortably in a folding chair. The image brightness of this scope
will surprise you, and is easily capable of 200+ magnification under good seeing conditions
Specifications
Clear Aperture: 98mm +2 /- 0 mm
Focal Length: 1020mm +/- 2%
Secondary: 1.16 minor axis elliptical flat
Airy Disc size: 13 microns
Spot Size at .25 degrees off-axis: 20 x 17 microns
Limiting Magnitude: 11.1
Theoretical Resolution Limit: 1.14"
Min./Max. Magnification: 25 / 255
Coatings: 96% reflectance
Focuser: Low Profile Helical (standard)
Tube Length/Diameter: 43.5" x 6.0"
Average Eyepiece Height at Zenith: 46"
Tube Weight: PVC 8 lbs/ Fiberglass 6 lbs
Mount/Yoke Weight: 18 / 4 lbs ( 22 lbs combined )
Prices
Mounted PVC Standard: $745.00
Mounted Fiberglass: $895.00
Tube Assembly Only: $575.00 (PVC)
Fiberglass Tube Assembly: $725.00
Optics Set: $345.00
S&H: Mounted $45.00 Tube Assy $20.00
Optics Set: $10.00
(Continental U.S. Only)
Current Delivery Time: 6-8 weeks
Prices Do Not Include:
Duties, Fees, or Taxes
Tel. 978-874-2985