The OA-5.5
The OA-Series "midsize" telescope is an example of a little more being a lot more with
regard to performance. In good seeing conditions the detail seen in Jupiter`s cloud bands is
truly more than can be described. Still reasonably portable, it fits in my Metro, but not as
easily as the OA-4.0. An adjustable chair or bar stool is ideal for viewing with this scope.
Specifications
Clear Aperture: 139mm +/- 2mm
Focal Length: 1410mm +/- 2%
Secondary: 1.56 minor axis elliptical flat
Airy Disc size: 13 microns
Spot Size at .25 degrees off-axis: 22 x 20 microns
Limiting Magnitude: 12.4
Theoretical Resolution Limit: .83"
Min./Max. Magnification: 35 / 350
Coatings: 96% reflectance
Focuser: 2" Low Profile Helical (standard)
Tube Length/Diameter: 59 x 8.0"
Average Eyepiece Height at Zenith: 64"
Tube Weight: Fiberglass 14 lbs
Mount/Yoke Weight: 30 / 4 lbs ( 34 lbs combined )
Prices
Mounted Fiberglass: $1645.00
Fiberglass Tube Assembly: $1375.00
Optics Set: $695.00
S&H: Mounted $60.00 Tube Assy $25.00
Optics Set: $10.00
(Continental U.S. Only)
Current Delivery Time: 12-14 weeks
Prices Do Not Include:
Duties, Fees, or Taxes
Tel. 978-874-2985