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Celestron Deluxe Off-Axis Guider - 93648

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Accessory
Celestron
93648
$395


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Highlights

  • Most accurate way to guide – improved accuracy compared to using a separate guide scope
  • 12.5mm multi-coated prism with optimized performance for maximum reflectivity and illumination to the autoguider
  • Fixed-orientation helical focuser for easy, smooth and accurate autoguider focus
  • 48mm clear aperture supports full frame cameras without vignetting
  • Includes adapters with the correct spacing for DSLR cameras, Nightscape CCD and other popular astroimaging cameras
  • Ideal for Schmidt- Cassegrain and EdgeHD telescopes

The Off-Axis Guider is an essential astroimaging accessory for long focal length telescopes that require the most accurate guiding possible. The Celestron Off-Axis Guider uses a prism to intercept a small portion of the telescope’s focal plane (outside the field of view of the main imaging camera) to locate a guide star. Any movement seen by the guide star will be the exact same movement seen by the imaging camera. Guiding this way will correct for tracking errors, as well as opto-mechanical errors or flexure. The result: better astro images with pinpoint round stars.

Off-Axis Guiders have been around for a long time, but typically pose three main challenges:

  1. Finding a guide star from the far edges of the telescope’s focal plane can be difficult, considering the small field of view and sometimes less-than-ideal illumination.
  2. Getting both imaging camera and autoguider to reach focus with one another is time consuming and sometimes requires experimentation.
  3. Additional spacers and adapters are usually required for your particular camera, telescope, and autoguider, which adds to cost and complexity.

Celestron's Off-Axis Guider addresses these challenges by:

  1. Providing a large 12.5 mm prism that can be adjusted to move closer to the center of the telescope’s focal plane, depending on the size of the imaging camera. This results in brighter guide stars, with the help of the large prism to fully illuminate the autoguider sensor.
  2. Featuring a high-quality, fixed-orientation Helical focuser. This provides extremely smooth and accurate focus of the autoguider without changing (or twisting) the autoguider camera orientation.
  3. Including all the needed spacers and adapters are included for most common imaging configurations, including DSLR cameras, Nightscape CCD cameras, and more. The following adapters are included: SCT/EdgeHD, female M48, female M42 (T-thread), male M48, male M42 (T-thread), 3 T-thread spacers

Additional Specifications

Helical Focuser Travel: 8 mm
Telescope Connection: M42 T-thread, M48, and SCT/EdgeHD
Autoguider Connection: M42 T-thread, and standard 1.25" adapter
Camera Connection: M42 T-thread, and M48

MANUALS:
Off-Axis Guider Instruction Manual

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

Items that have been opened, damaged or are otherwise unsaleable will be subject to a minimum 10% restocking fee, to be assessed by Telescopes Canada upon receipt of the returned goods

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Typographical Errors and Order Cancellations

Telescopes Canada reserves the right to cancel an order due to an error in pricing by Telescopes Canada or one of our suppliers, equipment being no longer obtainable, or other events which are out of our control.

Client-Initiated Cancellations

Client-initiated order cancellations are accepted prior to delivery of the equipment to the customer, thereafter it is a return.
Weight 18 oz (510 g)
Clear Aperture 48mm (1.89")

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