The OA-5.1 ATS
The OA-5.1 ATS also imploys the "across the tube" secondary configuration
resulting in an 8" tube length reduction compared to it`s cousin the OA-5.5. As with the
OA-7.0 and 6.5 ATS, the primary mirrors come from the same aperture "parent" mirror
so you can choose which design best fits your observing requirements.
Specifications
Clear Aperture: 130 mm +/- 2 mm
Focal Length: 1410 mm +/- 2%
Secondary: 1.83" minor axis elliptical flat
Airy Disc size: 14 microns
Spot Size at .25 degrees off-axis: 22 x 20 microns
Limiting Magnitude: 12.1
Theoretical Resolution Limit: .89"
Min./Max. Magnification: 35 / 350
Coatings: 96% reflectance
Focuser: 2" Crayford low profile (standard)
Tube Length/Diameter: 52 x 8 "
Average Eyepiece Height at Zenith: 56"
Tube Weight: Fiberglass 12 lbs.
Mount/Yoke Weight: 28/ 4 lbs. ( 32 lbs. combined )
Prices
Mounted Fiberglass: $1725.00
Fiberglass Tube Assembly: $1445.00
Optics Set: $695.00
S&H: Mounted $60.00 Tube Assy $25.00
Optics Set: $10.00
Current Delivery Time: 10-12 weeks
Prices Do Not Include: Duties, Fees, or Taxes
Tel. 978-874-2985