What is the main benefit of using the SBIG AO-X over mount guiding alone?
A telescope mount can correct for slow drift and periodic error, at no more than about once per second. The SBIG AO-X makes corrections at a much higher frequency, allowing it to compensate for rapid atmospheric seeing (twinkling). This can give significantly tighter, rounder stars and higher resolution than mount-only guiding, under the right conditions.
Which guide camera do I need for the SBIG AO-X?
For modern SBIG cameras like the Aluma series, the SBIG StarChaser SC-4 off-axis guide camera is required. The AO-X is designed to bolt directly to the SC-4. Older STX or STXL cameras may use their integrated guiders, self-guiding filter wheels, or a Remote Guide Head placed behind the AO-X.
How much backfocus does the SBIG AO-X use?
The SBIG AO-X consumes 26.7 mm of optical length, also known as backfocus. You must ensure your imaging train has enough available backfocus to accommodate the AO-X, your filter wheel, the SC-4 guider, and your camera.
Will the SBIG AO-X work with my Aluma AC4040 camera?
Yes, the AO-X is fully compatible with the SBIG Aluma AC4040. This configuration requires the use of a StarChaser SC-4 off-axis guider, which sits between the AO-X and the camera.
Can I use the SBIG AO-X to improve images of planetary nebulae like the Ring Nebula (M57) with my 14-inch SCT?
It can help. A 14-inch telescope is within the 0.3 m to over 1 m range the AO-X is designed for. By correcting image motion at up to 10 Hz, the SBIG AO-X can tighten star images and improve resolution under the right conditions, which benefits small, detailed targets like the Ring Nebula (M57).
My telescope has a 3-inch threaded focuser. How do I connect the SBIG AO-X?
To connect the SBIG AO-X to a standard 3-inch threaded focuser, you will need the optional 10018 adapter, which provides a 3-inch x 24 tpi thread on the telescope side of the unit. Other optional adapters are available for 2-inch and 3-inch slip-fit nosepieces.
