Astrographs by AstroSystemeAustria are absolute High End Devices.
We use only the prime components that are available at present. Uncompromising optical design of Dipl.phys. Philipp Keller, latest CFK manufacture techniques.
All ASA astrographs have ASA optics of Suprax material with Zygno interferogram with P/V <1/7 lambda wave, >97% mirrored.
All telescope tubes are manufactured of sandwich carbon fibre, and the external view captivates by the high-grade sight carbon fibre workmanship.The use of carbon fibre makes the telescopes up to 60 % lighter and the focus remains long-term stable in temperature due to the insignificant extension coefficient. Therefore and because of the extremely precise execution the collimation of the system is very stable.
The main mirrors are provided with a triangle which is a reference mark to precisely collimate with catseye collimation tools, which we recommend.
ASA offers Astrographs with focal ratio from f 2.2 to f 3.8 with a 3” JMI focuser. To correct the field ASA use the Correctors designed by Dipl.phys. Philipp Keller.
Our Standard 3” Wynne covers a corrected field of 50mm. All correctors have sufficient backfocus to be connected to all popular camera systems.
All our astrographs with <3" focuser may be used for three different focal lengths, employing appropriately calculated correctors. The original focal length of the device can – given the matching corrector – be shortened by the factor 0.75 or be extended by the factor 1.8! As usual, in uncompromising quality!
Hence, if you wish so, you have three telescope focal lengths with perfect picture quality united in one compact and light-weight telescope!
With a few movements, the optic is adjusted in focal length and aperture ratio to the shooting situation!
Example: an ASA astrograph N 8”/f 3.8 with f 760 mm can also be used as 570 mm/f 2.75 or as 1368 mm/f 6.85!
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