The ASA 400 telescope is used by professional observatories, research institutes and universities alike. These exacting telescope systems are designed and developed by the respected physicist and optical designer Dipl. Phys. Philipp Keller and offer an extremely high level of performance. The tubes are designed as lattice constructions using Carbon Fibre Re-enforced Polymer (CFRP) tubes. The optics are made of Quartz glass and precision engineered by ASA's own optical manufacturing facility.
Optical tubes are offered for either equatorial or alt-azimuth mounts. For imaging the telescope features motorised secondary mirror focusing. The standard RC design can operate without the need for correctors, however for larger sensors they must be used in conjunction with the ASA/Phillipp Keller designed Field Flattener or Reducer. With these the ASA400 is designed to be used with large CCD sensors (with an image circle of up to 150 mm) for pinpoint stars right into the corners.
As would be expected for a professional telescope system such as this, options are available. As standard we offer the ASA400 as a Ritchey-Chrétien design with Quartz optics. Alternatively the telescope may be ordered as a Cassegrain. This design is not so tolerent of imaging use without a corrector however the simpler design of the mirror reduces the overall cost. The optics may also be substituted for Astro-Sital and manufactured by LOMO. The optcial quality for the telescope is set at;
System Wave front accuracy minimum L/8 Peak to Valley at 632nm in focus
System Wave front accuracy minimum L/35 RMS at 632nm in focus
Standard Mirror Coating is Aluminium and Quartz. Gold and Silver available as an option
General Specifications
Optics design by Dipl.Phys. Philipp Keller
Ritchey-Chrétien (RC) optics
Zero expansion Quartz glass mirrors from ASA Optics
Optional field flattener and reducer
Secondary mirror focusing
Perfect for remote operation
Computer-aided design CNC production with high-quality aluminum and carbon materials
