The OA-6.5 ATS
DGM Optics is pleased to announce the addition of the OA-6.5 ATS to the OA-Series™
telescopes. The OA-6.5 ATS will utilize an "across the tube secondary"' optical configuration as
does the OA-9.0 The use of this design will reduce the tube length by 10" compared to the
standard OA-7.0 and allow for the use of a Crayford focuser as standard equipment.
Specifications
Clear Aperture: 165 mm +/- 2 mm
Focal Length: 1720mm +/- 2%
Secondary: 2.14" minor axis elliptical flat
Airy Disc size: 13 microns
Spot Size at .25 degrees off-axis: 33 x 30 microns
Limiting Magnitude: 12.9
Theoretical Resolution Limit: .70"
Min./Max. Magnification: 32 / 440
Coatings: 96% reflectance
Focuser: 2" Crayford low profile (standard)
Tube Length/Diameter: 63 x 10.2 "
Average Eyepiece Height at Zenith: 65"
Tube Weight: Fiberglass 16 lbs
Mount/Yoke Weight: 40 / 6 lbs ( 46 lbs combined )
Prices
Mounted Fiberglass: $2475.00
Fiberglass Tube Assembly: $2225.00
Optics Set: $995.00
S&H: Mounted $100.00 Tube Assy $40.00
Optics Set: $15.00
(Continental U.S. Only)
Current Delivery Time: 18-20 weeks
Prices Do Not Include: Duties, Fees, or Taxes
Tel. 978-874-2985