ASA H400

Lightweight and compact, ideal for astronomical widefield imaging


from €44,000 (net ex works)
delivered in 4 months

Fast, high resolution wide field pictures of the night sky

This fact made the hyperbolic ASA telescope of choice for the professional project Super Wasp II, a program searching for EXO-planets, which is supported by eight universities, including the Universities of Geneva, Leicester, Queens Belfast, Warwick and the German Space Agency DLR at Berlin.

Main Data  
Focal length 960 mm
Focal ratio f2.4
Corrected field of view 70 mm diagonal
Main mirror 400 mm hyperbolic
Mirror material Fused Silica (quartz), ultra low thermal expansion 0.55e-6/°C
Weight 67 kg
Software ASA Software, Windows package and Linux SDK (optional)
System Performance with ASA Direct Drive
Pointing accuracy < 12” RMS with pointing model (for altitude 20° to 85°)
Tracking accuracy < 0,35” RMS within 5 minutes (at optimal ambient and sky conditions) over 5 min 0,07” RMS/min
Slewing speed 6°/sec (up to 10°/sec optional)


Corrected field of view of 70 mm

Short exposure times and excellent signal-to-noise ratio

Hyperbolic primary mirror and  integrated corrector provide superb field correction

Lightweight and compact 

960 mm Focal length
2.4 F ratio

Basic Equipement

  • Carbon tube with mirrors
  • AAF 5 focuser
  • Mounting plate for ASA mounts
  • 4 lens corrector
  • Laser Collimation kit
  • Dust protection
  • Robotic tube cover
  • Transport case

0x more precise

ASA Direct Drive

0% more favorable

ASA Modular System

Optional Equipment

  • ASA camera adaptor
  • ASA off axis guider
  • ASA flightcase
  • ASA tube rings
  • ASA Direct Drive mounts


Thermal analysis H400

The tube of the H400 uses carbon which has a very low thermal expansion coefficient. The main mirror is made from Fused Silica which has a very small thermal expansion as well.

The calculations (pictures) demonstrate the very small temperature sensitivity of the H400, where not even refocusing is needed. The thermal analysis has been made with Zemax, using the correct thermal expansion data for the mirror, tube, lens cell and lens glasses used.

seeing is believing.