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SBIG OAG-8300 Off Axis Guider
The innovative OAG-8300 turns any STF-8300 into a self-guiding camera system. The OAG-8300 is designed to work with either the 5-position or 8-position filter wheel. Color cameras, or mono cameras without a filter can also use the OAG-8300 with a spacer and the OAG-8300 is backward compatible with all ST-8300 models. What is unique about the OAG-8300 is the 7-element internal optical design. The OAG contains relay optics that move the guide camera to the side of the imaging camera, and at the same time, a 0.7X reducer effectively doubles the field of view of the guider. This design allows for a low profile between the camera and the telescope, reducing backfocus requirements, and at the same time, gives a wide field of view that offers more guide stars for the guide camera.
Note: If you are adding the OAG-8300 to an STF-8300 color camera without a filter wheel, you must also use the Filter Wheel Spacer accessory . If you are adding the OAG-8300 to an STF-8300 mono camera using a filter wheel, the spacer in not needed.