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SBIG AO-8 Adaptative Optics

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Adaptive Optics unit for Aluma and STF cameras

The AO-8A works with the STF and Aluma series cameras.

The AO-8A requires an off-axis guide camera behind the device.  For Aluma cameras this requires either a StarChaser SC-2 or a Remote Guide Head used with a custom Off-Axis Guider.  All STF cameras are supported via the StarChaser SC-2 (except STF-402 due to different mounting interface). Also works with older self-guided Aluma wheels.

AO Results

The images below are actual star images showing the effect of image wander corrected at 1 Hz and 10 Hz:

1 Hz Corrections

10 Hz Corrections

And the resulting size of the star image in a long exposure:

1 Hz Corrections

10 Hz Corrections

Other data gathered by Brad Wallis of JPL (Brad Wallis and Benoit Schillings developed the prototype for the original AO-7) show the the effect of rapid corrections on poor seeing.  At 1 Hz the larger, slower component is reduced, but the amplitude of the jitter remains about the same:

However, at a 5Hz correction rate, the faster jitter is reduced:

And at a 10 Hz correction rate, significant improvement is seen:

The improvement in stellar profiles can also be seen at corrections above 1 Hz.  First by looking at the non-AO guided image:

And comparing the non-AO guided image to the AO guided image there is again significant improvement in the FWHM of the star profile:

Telescope mounts cannot correct faster than about once per second.  The 10Hz rate of the AO will clearly result in improved resolution under the right conditions.


OS Compatibility

Windows 32 and 64 bit OS, Mac

Computer Interface




User’s Manual

Manual for the AO-8T adaptive optics unit.



Backfocus Table

Backfocus configuration table

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Warranty Information

1-Year Warranty. Read more.
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