QHY Off-Axis Guider (OAG)

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QHY Off-Axis Guider (OAG)

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€ 245.00 Price excl. German VAT tax (19%): € 205.88

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  • There are three models of QHYOAG (QHYOAG-S, QHYOAG-M, and QHYOAG-L) with different apertures available, suitable for different sizes of CCD or CMOS cameras
  • Direct connection to the camera with six M3 screws ensures connection accuracy and parallelism
  • Precise Easy Focusing. After focusing, you can lock the focus mechanism with thumbscrews.
  • Includes a precision 1.25-inch helical focuser that accepts the QHY5II and QHY5III guide cameras
  • Telescope interface: M42/M54/M62 (depending on OAG model)
  • Please select the appropriate QHYOAG (QHYOAG-S, QHYOAG-M, and QHYOAG-L) for further technical details form the Drop-Down menu below

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€ 245.00 Price excl. German VAT tax (19%): € 205.88

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QHY Off-Axis Guider (OAG)

Provides a reliable mechanical connection for your photography.

The main purpose of the OAG is to use the same optical path as the main camera. This avoids the problem of differential deflection that can occur when using a separate optical system for guiding. In the case of the OAG, a part of the image is picked-off from the edge of the imaging circle which does not block the main CCD. This method provides more accurate guiding and sharper images.

There are three models of QHYOAG: QHYOAG-S, QHYOAG-M, and QHYOAG-L for different size sensors. The QHYOAG is a thin and solid design. The OAG main body is just 10mm thick. Adding an M42 thread or M54 adapter ring adds only 3mm for a total thickness of 13mm. The OAG-M is also attached to the CFW2 filter wheel with M3 screws.

There are six 3mm through holes in the OAG for direct connection to the QHYCFW2 and QHY "A" series cameras . If you do not have a QHYCFW2 or QHY "A" series camera, you can also use this OAG with a third-party adapter ring on the camera side.

The QHYOAG comes with a multithread 1.25-inch focuser. The focuser has a locking thumbscrew to hold the guide camera fixed after focusing. The prism position can be adjusted and can be locked to fix its position. The prism is 8mm x 8mm size and the aperture between the prism and mirror is 8mm in diameter.

The light patch hole of the QHYOAG is 7mm for the guider camera.

QHYOAG can be used with QHY5-II series guider. Please note the distance from prism surface to the guider camera sensor should be the same as the distance to the main CCD sensor. If the distance is too short even if the guider is in its shortest position, guider will still be unable to reach focus. You can remove the QHY5-II's front part to reduce the distance a little. If the distance is too long, you can either plug the guider a little bit out of the focuser, or you can use the 1.25inch extender that comes with the QHY5-II series camera.

Further detail information can be found on the webpage of QHYCCD

If you have any further questions, please send us an email to kontakt (at) baader-planetarium.de.

Please note the additional details on the Tab "Downloads"

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WUNDERWERKLEBEN 167/06/2022 17/06/202210:09
  • Rating:
Hochwertige Verarbeitung
Die Lieferung war sehr schnell da und ist auch unbeschädigt bei mir angeliefert worden.
Der OAG sieht sehr hochwertig verarbeitet aus und ist es auch.
Die Aufnahme für 1,25 Zoll Kameras ist genial, da man den Fokus noch mal separat justieren kann. Die Einstellung des Spiegels, durch verschieben, ist nur bedingt praktisch, da die Justageschraube an der Seite nicht den kompletten Verstellweg abdeckt. Etwas schwierig ist auch das Ausrichten auf den Sekundärspiegel, den das "Spiegelrohr" hat viel Spiel nach vorne und hinten und man hat dann verzerrte Sterne beim Guiding.
War etwas zeitraubend, aber jetzt passt alles gut und es funktioniert hervorragend. Man sollte diese Einstellung fix beibehalten,
Hab mir den OAG-M für meine QHY183C bestellt.
Normalerweise passt der OAG-M nicht auf die Kamera, aber mit den mitgelieferten teleskopseitigen Adapterringen 2Stück M54 und 2Stück M42
konnte ich die Kamera montieren. Hatte noch einen M42 Außengewindering der genau in den "Schwalbenadapter" der Kamera passte, ohne die Sensorbelichtung zu stören, super Sache.
Jetzt kann ich mit der QHY183C und auch anderen Kameraanbindungen
Off-Axxis Guiding und ein QHY CFW-M-SR ohne weitere Anpassungen betreiben.


  • Die separaten Einstellmöglichkeiten zum fokussieren.
    Die hochwertige Verarbeitung
    Sehr gute Passung mit dem Adapter Kit D
  • Passung des Auszugsrohr des Spiegels in der Führung
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