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Condition: This is an Askar M54 OAG Off-Axis Guider in good condition. The body is clean and unmarked. HOWEVER . . . there is a small chip in the prism. See the photos.
The previous owner has assured us that this chip does not affect its use/operation. However, this is a pretty significant defect in the operating end of the OAG, so we have discounted the price heavily - it's ONE-THIRD the new price.
Meanwhile, all of the nosepieces are present - some never out of their original wrappers - in the original box with manual.
Improve your guiding with Askar's Off-Axis Guider (OAG)! The prism of this M54 off-axis guider measures 10 mm x 10 mm. This larger area allows the OAG to collect more light and makes it easier to acquire the targeted star for automatic guiding. No need for a separate guide scope.
On the telescope side, the Askar Off-Axis Guider can be attached to M54 threads with the included front gasket, or to M48 or M42 threads with the included adapters. Similarly, the camera side can be attached to M54, M48, or M42 with the included camera adapters. In addition, each camera adapter can be used in conjunction with an included 18 mm extender. The size of this OAG makes it a good fit for use with full frame cameras.
The OAG is made from CNC machined materials in a matte black finish. It includes an integrated helical focuser that has a journey of 10 mm. The focuser has a 1.25" adapter with M42x0.75 external threads to accommodate a guide camera. The thickness of the guider itself (for back focus calculation) is 19.5 mm.