DetailsThe SBIG OAG 8300 is a precision off axis guider that is compatible with the ST and STF 8300 cameras. Seven element internal optics system moves the guide camera to the side of the imaging camera. Incorporates a 0.7x reducer for twice the field of view than other off axis guiders. Slim profile adds only 19mm of back focus. Four positions for the guide camera available to help manage cord placement and allow for proper telescope movement. Guide in front of the filters, allowing you to leave your narrowband filters in place.
- Additional Information
SKU SB-OAG-8300 Manufacturer SBIG Warranty 2 Year Warranty
- Questions & Answers
I currently use the STF-8300M with an SX FW and SX Thin OAG but have trouble getting a guide star with long FL scopes. I'm looking at this OAG to replace the SX one and I already have an adapter worked up at Precise Parts. Can the SX X2 guide camera work with this OAG? What focus mechanism does the SBIG OAG use? I need to make sure I get the CCD and guide camera evenly spaced from the prism I think.
MikeQuestion by: Michael Rogers on Jan 26, 2017 6:31:00 PMThe SBIG OAG is designed to bolt on to the STF-8300 camera filter wheel at a back focus of around 35mm from the sensor. As your setup will be far beyond that (the SX filter wheel is ~29mm deep by itself, no counting your camera or Precise parts adapter), you will need an extension to bring the guide camera to focus. You will likely have to determine the length by trial and error once you have the custom adapter and the OAG.
The SBIG OAG-8300 has no focusing mechanism. Like the SX version, you slide the camera up and down to bring it to focus with the main camera before locking it with a setscrew. You can use the Lodestar-X2 as long as you find a working C-mount to 1.25" adapter of the right length.Answer by: Chris Hendren (Admin) on Jan 30, 2017 9:23:00 AMThe OAG-8300 comes with 3 different options for selecting the adapter plate: STL size (2.156"), SCT size (2") or T-thread, according to the manufacturer. What kind of adapter plates can you offer? What kind of plate would you recommend for SkyWatcher Esprit 120ED for best performance (to avoid possible vignetting with T-thread adapter, which is the smallest one)?
ThanksQuestion by: Leonid Shatz on Apr 9, 2015 1:57:00 PMWe can offer those 3 sizes as well as custom adapters made by Precise Parts to larger threads. Please contact us by phone or e-mail so that we can tailor a solution for your specific need. If you use a larger plate, you will also need an adapter/nosepiece that can fit the Esprit's focuser.Answer by: Chris Hendren (Admin) on Apr 10, 2015 2:28:00 PM
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