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Guiding, Centering & Adaptive Optics

7 Items

ATIK ST4 Compatible Autoguider Cable (2 m) - ATK0027

SKU: ATK-ATK0027
  • Atik Autoguider Cable for the ST-4 autoguiding system.
  • Measures 2 meters in length.
  • Enables connection between your Atik Autoguider and your astro-imaging configuration.
  • The Atik ST4 Autoguiding Cable uses RJ11 connectors.
$6.00
Atik Off Axis Guider Camera Adapter

Atik Off Axis Guider Camera Adapter - ATK0099

SKU: ATK-ATK0099
  • Adapts the Atik Off-Axis Guider for installation on CCD cameras not using the EFW2 filter wheel.
  • Employs the same camera adapters as the EFW2 to enable full camera rotation.
  • This Atik Off-Axis Guider Adapter helps maintain correct focusing distance.
$45.00

Meade Autoguider Port Module for LX80 & LX90 Telescopes - 07509

SKU: MEA-07509
  • The Meade 07509 Autoguider Port Module is expressly designed for LX80 and LX90 telescopes using the Meade AudioStar hand control.
  • Enables long exposure astrophotography by permiting the use of CCD autoguiders.
  • Connects via the AUX input port on the LX80 or LX90 telescope control panel.
  • This Meade Autoguider Port Module is not suitable for use with hand controllers other than the AudioStar such as the 497 AutoStar that comes with some LX90s as well as other models.
$54.95
Starlight Xpress AO/OAG Extension Tube

Starlight Xpress Extension Tube for AO or OAG

SKU: SLX-AO-OAG-EXT
  • Starlight Xpress Extension Tube for the Ultra Slimline Off-Axis Guider or Off-Axis Guider with AOLF Active Optics.
  • Compensates for longer back focus distances exhibited by DSLRs and other cameras from competing brands by allowing you to move the guide camera further away from the OAG prism.
  • This extension tube measures 30 mm in length.
  • Construction consists of black anodized aluminum.
$40.00
Starlight Xpress Slimline OAG to AO Adapter

Starlight Xpress Slimline OAG to AO Active Optics Adapter

SKU: SLX-SOAG-AO-APT
  • Use this Starlight Xpress adapter to mount the SX Universal Filter Wheel and Slimline Off-Axis Guider to the back of the Active Optics unit, thus compensating for back focus issues.
  • Eliminates the need for using the standard OAG included with the AO-LF system, enabling the use of the Starlight Xpress Slimline OAG instead.
  • Slimline OAG bolts directly to the front of the filter wheel, making screw thread adapters unnecessary.
  • Combining the Starlight Xpress Slimline OAG and Active Optics unit will greatly improve the accuracy of your astro-imaging system.
$60.00

ADM V Series Guidescope Kit For Celestron C8 - V-C8-125

SKU: ADM-V-C8-125
  • Type of Mounting Hardware: Ring Kits
  • Dovetail or Attachment Type: V-Series (Vixen)
  • Solid or Split (Cradle) Ring: Solid Ring(s)
$169.00
ZWO M42 Camera Adapter for ZWO Off-Axis Guider

ZWO M42 Adapter (OAG) - OAG-M42C

SKU: ZWO-OAG-M42C
  • ZWO Off-Axis Guider OAG adapter with M42 threads.
  • Connects the ZWO OAG to M42 threaded imaging cameras.
$18.00

Guiding can be a daunting task for the new astrophotographer, but it doesn’t have to be. An equatorial mount is a must-have for anyone interested in imaging celestial objects. An equatorial mount compensates for the Earth’s rotation to help your setup stay fixed on a guide star. However, there are many more accessories that can help you guide easily and hassle-free. The three basic tools that astrophotographers use are an off-axis guider, auto-guider, and a guidescope.


An off-axis guider (OAG) connects to your main optical train and typically uses a prism to redirect a small pathway of light to a separate guiding camera. This way, you can do short exposures, detect stars, and calculate guiding errors. This setup is a lightweight option and, in most cases, will not add flexure to your imaging setup. Also, an OAG is typically a cost-effective option: all you need is an OAG and a guiding camera. However, an OAG will add extra length to your imaging train, so it may be cumbersome to obtain focus. We recommend OAGs for new amateur astrophotographers because it is a straightforward and inexpensive guiding system.


If you are looking for a more advanced guiding system, then a guidescope is the way to go. These scopes are typically small refractors that you mount on top of your main imaging system. This is a great option for astrophotographers who prefer to image through a smaller aperture and slower telescope because this is when stars are more difficult to see through an OAG. However, piggybacking a guidescope adds significant weight to your setup and can cause flexure or extra strain on the mount.


An autoguider is an excellent choice for astrophotographers looking to take long exposures. This high-tech camera sits on the back of your guidescope or OAG. The autoguider is then connected to your mount to keep your setup continuously tracking the guide star throughout your imaging session. This dramatically reduces tracking errors and eliminates drift, which can cause oblong stars to appear in your image. Autoguiding is perfect for deep-space imaging, where it is crucial to be precise when guiding.

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