ZWO OAG-L-68 Off-Axis Guider

Name: ZWO OAG-L-68 Off-Axis Guider
Brand: ZWO

ZWO

ZWO OAG-L-68 Off-Axis Guider guides through the main telescope's light path to reduce flexure on demanding imaging rigs.

off-axis-guider $

Best Current Offer

Astronomics

In stock

$249.00

Other retailers

Starizona (In stock)
$249.00
ZWO USA (In stock)
$249.00
Mile High Astronomy (Out of stock)
$249.00

Specifications

Overview

Guider type: Off-axis guider

Mechanical

Format: Large-format OAG
Thread / connection: M68

Use

Primary use: Guiding through the main imaging telescope to eliminate guide-scope flexure

Astrophotography Fit

Best for long focal length or mirror-based systems where a separate guide scope can drift relative to the imaging camera.

ZWO OAG-L-68 Off-Axis Guider uses a pick-off prism ahead of the camera so the guide camera sees the same tracking errors as the imaging sensor. That makes it the preferred guiding approach for SCTs, RCs, and long refractors.

Setup takes patience: prism height, guide-camera focus, back focus, and filter-wheel spacing all interact. Once dialed in, it is more dependable than a separate guide scope for demanding rigs.

Best paired with

SCT, EdgeHD, RC, or long refractor imaging trains
Sensitive guide cameras with enough sensor area for guide-star choice
Threaded camera/filter-wheel stacks with known back focus

Not recommended for

Very short wide-field rigs where a guide scope is simpler
Beginners who need the easiest possible guiding setup
Imaging trains with no back-focus room for an OAG body

Where To Buy

Some links on this page are affiliate links. Prices and availability are pulled automatically from each retailer and updated daily.

Retailer	Price	Availability	View Offer
Astronomics Astronomics	$249.00	In stock Updated 11/4/2026	View Offer - $249.00
Starizona Starizona	$249.00	In stock Updated 11/4/2026	View Offer - $249.00
ZWO USA ZWO USA	$249.00	In stock Updated 11/4/2026	View Offer - $249.00
Mile High Astronomy Mile High Astronomy	$249.00	Out of stock Updated 11/4/2026	View Offer - $249.00

Price History

Chronological retailer pricing with out-of-stock points shown at reduced opacity.

Astronomics Mile High Astronomy Starizona ZWO USA