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Guiding, Centering & Adaptive Optics

Items 1 - 25 of 45
Celestron Off-Axis Guider

Celestron Off Axis Guider - 93648

SKU: CEL-93648
  • For astrophotography applications, an Off-Axis Guider such as this particular unit from Celestron is an essential accessory because it makes heavy guide scopes unnecessary.
  • Allows the same scope to be used for both imaging and guiding.
  • Eliminates flexure, mirror flop, and other tracking issues.
  • Features an independent 360º camera and telescope rotation controls.
  • Compatible with any T-thread or 48 mm filter wheel.
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$259.95 $249.00

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.
$5.00

Atik Off-Axis Guider - ATK0070

SKU: ATK-ATK0070
  • With this Atik Off-Axis Guider and its precise fine-focus system, you can create your own optimal guiding system.
  • Three different extension ring lengths allow this OAG to reach focus using a wide variety of imaging cameras.
  • Moving prism helps with selecting the star best suited for your guiding needs.
  • Weighing in at 6.35 ounces, the Atik Off-Axis Guider has a 54 mm clear aperture.
  • Compatible with sensors sizes up to full frame 35 mm
$227.00

Baader Off-Axis Guider for RCC Newton Coma Corrector - GUIDER

SKU: BAD-GUIDER
  • This Baader Planetarium Off-Axis Guider is specifically designed for use with the RCC-I Coma Corrector.
  • With a body measuring 36.5 mm in length, backfocus is set at the theoretical required distance of 91.5 mm for the RCC-I.
  • This OAG combined with a Baader t-ring and crossaim eyepiece or guider enables "Off-Axis" guiding with DSLR cameras without having to use extra rings or extensions.
  • Axial and radial guidestar are conveniently adjustable without having to loosen the main camera connection.
  • Suitable for use with 1.25" autoguiders and guiding eyepieces.
$189.00

Celestron Off Axis Guider - 93648 - Used

SKU: UEQ-11736-CEL-93648
  • For astrophotography applications, an Off-Axis Guider such as this particular unit from Celestron is an essential accessory because it makes heavy guide scopes unnecessary.
  • Allows the same scope to be used for both imaging and guiding.
  • Eliminates flexure, mirror flop, and other tracking issues.
  • Features an independent 360º camera and telescope rotation controls.
  • Compatible with any T-thread or 48 mm filter wheel.
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$259.95 $205.00
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.
$47.00

Orion Thin Off-Axis Guider For Astrophotography - 05531

SKU: ORI-05531
  • This Orion OAG is a elegantly thin Off-Axis Guider optimally suited for use with Newtonian reflector telescopes and DSLR cameras.
  • Permits simultaneous imaging and guiding via a single telescope without requiring a separate guide scope.
  • With only 10.5 mm of thickness, this Orion Off-Axis Guider is a perfect match for telescopes with restricted back focus travel like Newtonian reflectors.
  • This OAG's thin profile keeps it from meddling with the use of coma correctors.
  • Fixes any existing flexures preventing accurate guiding and tracking.
$129.99

ZWO 60mm Guide Scope - ZWO-60280

SKU: ZWO-60280
  • Optical Aperture: 60 mm
$118.00 $106.20
$149.00

Orion Deluxe Off-Axis Guider for Astrophotography - 05521

SKU: ORI-05521
  • In order to simultaneously image and guide using the same telescope without an independent guide scope, you need this Orion Deluxe Off-Axis Guider.
  • By not having to use a separate guide scope, tracking issues such as differential flexure and mirror shift are eliminated while overall weight and setup time are reduced.
  • Suitable for use with autoguiders that have T-threads or a 1.25” nosepiece, along with 1.25” illuminated reticle eyepieces.
  • Includes a 2” nosepiece for attaching to any 2” telescope focuser, or any rear cell equipped with T-threads.
  • Three T-extensions of varying lengths (7 mm, 17 mm, and 30 mm) are also included to comply with different combinations of cameras and guiders.
  • Easily locate a guide star with prism tilt adjustment and over 100 degrees of radial adjustment.
$99.99

Orion Mini 50 mm Guide Scope - 08891

SKU: ORI-08891
  • Optical Aperture: 50 mm
$79.99

Orion StarShoot Auto Guider - 52064

SKU: ORI-52064
  • Color or Monochrome Camera: Monochrome
  • Cooled or Uncooled: Uncooled
  • Pixel Array & Resolution: 1280 x 1024 (1.3 MP)
  • Pixel Size in Microns: 5.2
  • Sensor Model: MT9M001
$299.99

Celestron OAG Wide Adapter for 9.25" EdgeHD, 11" SCT, & 14" SCT - 93652

SKU: CEL-93652
  • The combination of this adapter and the Celestron Off-Axis Guider enhances imaging with larger SCT and EdgeHD telescopes by providing a larger area of illumination.
  • Specifically designed for use with 9.25", 11", and 14" Schmidt-Cassegrain and EdgeHD telescope optical tubes.
  • Best suited for the Canon 5D or 6D and other large format cameras as it enables full image circle use for improved illumination of the sensor.
  • This Celestron OAG Adapter is made of black anodized aluminum and features a wide 62.7 mm clear aperture.
$31.95 $24.95

ZWO Atmospheric Dispersion Corrector - ADC

SKU: ZWO-ADC
  • 1.25" eyepiece adapter with brass compression ring on the top side
  • 1.25" barrel adapter on the bottom side
  • Contains female T-threads on both sides
  • A white locking screw makes the null point easily detectable for setting the levers symmetrically and fine positioning without rotating the ADC body
$128.00 $115.20
ADM Accessories Max Guider Female Base with Attached Telescope

ADM Accessories Max Guider Guidescope Aiming Device - Female Saddles - MAX-F

SKU: ADM-MAX-F
  • Type of Mounting Hardware: MaxGuide/Aiming Kits
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$440.00

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.
$59.99 $54.95
Orion StarShoot AutoGuider with 60 mm Guide Scope

Orion StarShoot AutoGuider and 60mm Guide Scope Package - 21404

SKU: ORI-21404
  • Color or Monochrome Camera: Monochrome
  • Cooled or Uncooled: Uncooled
  • Pixel Array & Resolution: 1280 x 1024 (1.3 MP)
  • Pixel Size in Microns: 5.2
  • Sensor Model: MT9M001
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$429.99
SX Lodestar X2 Autoguider

Starlight Xpress Lodestar X2 Autoguider - Monochrome - LXLODESTAR-M

SKU: SLX-LXLODESTAR-M
  • Color or Monochrome Camera: Monochrome
  • Cooled or Uncooled: Uncooled
  • Pixel Array & Resolution: 752 x 582 (0.4 MP)
  • Pixel Size in Microns: 8.2
  • Sensor Model: ICX829 EXview HAD
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$625.00
SX Lodestar X2 Autoguider

Starlight Xpress Lodestar X2 Autoguider - Color - X2LODESTAR-C

SKU: SLX-X2LODESTAR-C
  • Color or Monochrome Camera: Color
  • Cooled or Uncooled: Uncooled
  • Pixel Array & Resolution: 795 x 596 (0.47 MP)
  • Pixel Size in Microns: 8.4
  • Sensor Model: ICX829 EXview HAD
Available Used from $495.00
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$625.00
Starlight Xpress Slimline OAG

Starlight Xpress Slimline OAG for USB Filter Wheel with Lodestar - SLFW-OAG

SKU: SLX-SX-SLFW-OAG
  • This Starlight Xpress Ultra Slimline OAG attaches directly to the SX USB Filter Wheel for enhanced guiding accuracy with no flexure.
  • Contributes only 13 mm to the focus wheel's back focus distance.
  • The Ultra Slimline OAG is expressly designed for use with the Starlight Xpress USB Filter Wheel and either the Lodestar, SXV, or SXV-EX autoguider.
  • Adjustable pick-off prism axis helps to maximize guide image quality.
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$230.00
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 AO-LF Active Optics - Side View

Starlight Xpress Large Format Active Optics Guiding System with OAG - SXV-AO-LF

SKU: SLX-SXV-AO-LF
  • The Starlight Xpress Large Format Adaptive Optics Guiding System enhances CCD images by efficiently correcting for rapid gear errors common to all but the most expensive mounts.
  • Image tracking and stabilization are enabled via a high speed tip-tilt optical window.
  • Offers fast 5mS per increment tracking speed.
  • Mount control output fixes large drive errors while preserving AO stabilization.
  • Image shift factor is separate from both the optical system and the back focal spacing.
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$1,700.00
Starlight Xpress AOQSI Active Optics - Shows Optional OAG

Starlight Xpress Large Format Active Optics Guiding System without OAG - SXV-AOQSI

SKU: SLX-SXV-AOQSI
  • Starlight Xpress Large Format Adaptive Optics Guiding System with no Off-Axis Guider for QSI WSG cameras which have an already built-in OAG.
  • Stabilizes even the most troublesome mounts by correcting rapid gear errors.
  • Image tracking and stabilization are enabled via a high speed tip-tilt optical window.
  • Offers fast 5mS per increment tracking speed.
  • Mount control output fixes large drive errors while preserving AO stabilization.
  • Image shift factor is separate from both the optical system and the back focal spacing.
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$1,400.00
Slimline OAG with Extension Tube

Starlight Xpress Slimline OAG & Extension Tube - SX-UOAG

SKU: SLX-SX-UOAG
  • This Starlight Xpress Ultra Slimline Off-Axis Guider attaches directly to the SX USB Filter Wheel for enhanced guiding accuracy with no flexure.
  • Contributes only 13 mm to the focus wheel's back focus distance.
  • The Ultra Slimline OAG is expressly designed for use with the Starlight Xpress USB Filter Wheel and either the Lodestar, SXV, or SXV-EX autoguider.
  • Adjustable pick-off prism axis helps to maximize guide image quality.
  • Comes with a 30 mm extension tube for modifying the back focus distance when using other cameras.
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$250.00

Atik One OAG Off-Axis Guider - ATK0132

SKU: ATK-ATK0132
  • Even though the Atik One Off-Axis Guider is slightly smaller, it still retains all of the features of the original Atik OAG.
  • This easy-to-use Off-Axis Guider is optimally suited for use in conjunction with the separately available Atik GP Guide Camera.
  • Adjustable pickup prism compensates for telescope type variation.
  • The Atik One OAG features a fast, exceptionally smooth, and easily adjustable focusing mechanism.
  • Offers 5 mm of travel distance to allow optional guide cameras to be focused without difficulty.
$186.00

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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