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ASA AZ1500 Ritchey-Chrétien Alt-Az telescope f6
Astrosysteme Austria
 
ASA AZ1500 high end telescope, large telescope
ASA AZ1500

An evolution milestone of high-end telescope systems with 1.5m aperture.

This complete solution represents a fully integrated alt-az observatory system. The AZ1500 1.5m is equipped with ASA optics (Fused silica, option Zerodur). This guarantees diffraction-limited performance and best micro-roughness values even under the most perfect Earth-based astronomical seeing conditions. With fast focal ratio, the design results in less obstruction, higher contrast, and a more compact system. The size and cost of your dome infrastructure is reduced.
1500mm f6/f2 Ritchey-Chrétien Nasmyth design is equipped with absolute encoder secondary mirror focusing unit and configurable with up to 4 Nasmyth ports.

Main Facts

Optical design
Ritchey-Chrétien RC
Linear central obstruction
43%
Focus position
Nasmyth 2 as standard, 4 as option
Focal ratio system
f6
Clear Aperture / Focal Ratio Primary Mirror
1500mm (59,1 inch) / f2
Image field
200mm (1.27 degrees)
Mirror material
Fused silica (option Zerodur)
Surface quality
>94 strehl
Microroughness
1nm RMS / <0.7nm Ra
Coating
Al+SiO2 >91%
Back Focus from flange
513mm
Total weight
5000kg (11023lbs)
Software
ASA Software package with a platform-independent Ascom Alpaca API (via TCP/IP), compatibility with numerous programs, and many additional API features for:
• Creating and optimizing pointing files
• MLPT (e.g., usable with a N.I.N.A plugin)
• Uploading and tracking TLE and CPF satellite orbits
• Orbit corrections when satellite tracking (autoguiding with external CCD cameras)
• Focus control also via Ascom Alpaca API
• Covers (if installed) via Ascom Alpaca API
• Full API control over rotator, Nasmyth port

Pointing Accuracy (20° to 85°)
<8” RMS with pointing model
Tracking Accuracy (20° to 85° – unguided, with current pointingfile)
<0,25” RMS within 5 minutes
System Natural Frequency
10 Hz or greater
Satellite tracking
All sky pointing error (20°-85°) 8” RMS  more info
 

27.08.2026 | technical modifications, printing and errors expected. Check for validity online!
ASA Astrosysteme GmbH | A-4212 Neumarkt i. M. | Galgenau 19 | +43 7942 778 11-500 | office@astrosysteme.com | astrosysteme.com

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