--- product_id: 440457 title: "Celestron Off-Axis Guider for Long-Exposure Astrophotography" brand: "celestron" price: "AED 1544" currency: AED in_stock: true category: "Celestron" url: https://www.desertcart.ae/products/440457-celestron-off-axis-guider-for-long-exposure-astrophotography store_origin: AE region: United Arab Emirates --- # 12.5mm multi-coated prism for max reflectivity 48mm clear aperture for full-frame cameras Fixed-orientation helical focuser for precise focus Celestron Off-Axis Guider for Long-Exposure Astrophotography **Brand:** celestron **Price:** AED 1544 **Availability:** ✅ In Stock ## Summary > 🌌 Guide your stars like a pro—capture the cosmos with unmatched precision! ## Quick Answers - **What is this?** Celestron Off-Axis Guider for Long-Exposure Astrophotography by celestron - **How much does it cost?** AED 1544 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ae](https://www.desertcart.ae/products/440457-celestron-off-axis-guider-for-long-exposure-astrophotography) ## Best For - celestron enthusiasts ## Why This Product - Trusted celestron brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Vignette-Free Imaging:** Generous 48mm clear aperture supports full-frame sensors, delivering edge-to-edge sharpness without dark corners. - • **Seamless Focus Control:** Smooth, fixed-orientation helical focuser ensures your autoguider stays perfectly aligned without frustrating twists. - • **Universal Compatibility:** Includes all essential adapters for DSLR, Nightscape CCD, and popular astroimaging cameras—plug and play simplicity. - • **Trusted Legacy & Support:** Backed by Celestron’s 2-year US warranty and expert support from a brand pioneering astronomy since 1960. - • **Pinpoint Precision Guiding:** Eliminate tracking errors with the large prism that captures brighter guide stars for flawless long-exposure shots. ## Overview The Celestron Off-Axis Guider is a premium astrophotography accessory designed for long-exposure telescopes. Featuring a large 12.5mm multi-coated prism and a fixed-orientation helical focuser, it provides superior guiding accuracy by capturing brighter guide stars without requiring a separate guide scope. Its 48mm clear aperture supports full-frame cameras without vignetting, and it comes with all necessary adapters for DSLR and CCD cameras. Ideal for Schmidt-Cassegrain and EdgeHD telescopes, it ensures pinpoint star images by correcting tracking and mechanical errors, backed by a 2-year US warranty and expert support. ## Description 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 astroimages 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 SpecificationsHelical Focuser Travel: 8mmTelescope Connection: M42 T-thread, M48, and SCT/EdgeHDAutoguider Connection: M42 T-thread, and standard 1.25" adapterCamera Connection: M42 T-thread, and M48 ## Features - Most accurate way to guide – improved accuracy compared to using a separate guide scope - 12.5mm multi-coated prism with aluminized backing 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 - UNBEATABLE WARRANTY & SUPPORT: Buy with confidence from Celestron, a leading telescope brand in California since 1960. Your purchase includes a 2-Year US Warranty and unlimited support from our team of US-based experts. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00DSXW5OU | | Additional Features | Off-Axis Guiding with Large Prism, Helical Focuser, and Included Adapters | | Best Sellers Rank | #67 in Telescope Finder Scopes | | Brand | Celestron | | Built-In Media | Deluxe Off-Axis Guider | | Coating | Multi-Coated | | Compatible Devices | [DSLR cameras, Nightscape CCD cameras, Telescopes with SCT/EdgeHD, M42 T-thread, M48 connections] | | Customer Reviews | 4.2 out of 5 stars 111 Reviews | | Eye Piece Lens Description | Fiber Optic | | Finderscope | Reflex | | Focal Length Description | 48 millimeters | | Focus Type | Manual Focus | | Global Trade Identification Number | 00050234936484 | | Item Dimensions D x W x H | 0.39"D x 0.39"W x 0.39"H | | Item Highlight | Precision Guiding with No Separate Guide Scope Required, Large Prism Design, DSLR & Astronomy Camera Compatible, T-Thread | | Item Weight | 0.8 kg | | Manufacturer | Celestron | | Manufacturer Part Number | 93648-CGL | | Model Name | Deluxe Off-Axis Guider | | Model Number | 93648-CGL | | Mount | Altazimuth Mount | | Number of Items | 1 | | Objective Lens Diameter | 42 millimeters | | Optical Tube Length | 7 centimeters | | Optical-Tube Length | 7 centimeters | | Telescope Mount Description | Altazimuth Mount | | UPC | 050234936484 | | Unit Count | 1 Count | | Warranty Description | ELESTRON TWO YEAR LIMITED WARRANTY | ## Product Details - **Brand:** Celestron - **Eye Piece Lens Description:** Fiber Optic - **Finderscope:** Reflex - **Focus Type:** Manual Focus - **Item Weight:** 0.8 kg - **Model Name:** Deluxe Off-Axis Guider - **Objective Lens Diameter:** 42 millimeters - **Optical Tube Length:** 7 centimeters - **Product Dimensions:** 0.39"D x 0.39"W x 0.39"H - **Telescope Mount Description:** Altazimuth Mount ## Images ![Celestron Off-Axis Guider for Long-Exposure Astrophotography - Image 1](https://m.media-amazon.com/images/I/51qAoWHlJ1L.jpg) ![Celestron Off-Axis Guider for Long-Exposure Astrophotography - Image 2](https://m.media-amazon.com/images/I/61i8qdgERqL.jpg) ![Celestron Off-Axis Guider for Long-Exposure Astrophotography - Image 3](https://m.media-amazon.com/images/I/517c7NSgg4L.jpg) ![Celestron Off-Axis Guider for Long-Exposure Astrophotography - Image 4](https://m.media-amazon.com/images/I/515ORt0-zaL.jpg) ![Celestron Off-Axis Guider for Long-Exposure Astrophotography - Image 5](https://m.media-amazon.com/images/I/51Df09IzPOL.jpg) ## Questions & Answers **Q: Do you need the large format adapter with edge 11 and asi294mc pro?** A: No, the sensor diagonal of the ASI294MC-P is 22mm. The standard SCT adapter that comes with the #93648 Deluxe Off-Axis Guider is fine and will not add additional vignetting. **Q: How do you connect the autoguider to the telescope?** A: Hi, every telescope has its own back focus requirements, mine the nextstar 8se is 105 mm ( a small variation is acceptable) now you have to keep trying different reducers and T adapters that came of the oag. The distance from the back end of the telescope to the front of the camera must be 105mm, the distance from the back of the telescope to the oag all the way to the guide camera must be equal to the distance from the back of the telescope to the main camera to achieve the required back focus on both cameras. It will not be an easy thing to achieve but you have have to keep trying, you can check YouTube from more details. **Q: Can i use this with an edge hd 8" plus the .7x reducer? that's a lot in the optical train to still focus the camera.** A: Back focus on the 8" Edge HD is 5.25 inches. You should be fine. https://www.cloudynights.com/topic/488238-8-edgehd-back-focus-question/ **Q: Will this work with my celestron 6se telescope, touptek gcmos usb 2.0 guider camera and canon eos1000d dslr camera?** A: You'll need a t-ring to mate the OAG to the DSLR. I would contact Celestron about the mating it to the 6se. Also, make sure the 6se can be auto-guided or this will not help you for auto guiding. It should have a port clearly marked auto-guide if it can do this. I'm assuming you want to do long-exposure astrophotography. If it can be auto-guided then you will need an equatorial wedge to align with the north celestial pole (NCP). Aligning with the NCP prevents field rotation. You can't do that with an Alt/Az mount unless you have a wedge or rotator to de-rotate the field. You'll need to know what the back-focus of that scope is and set your camera sensor that distance from the back of the scope. You also need the back focus of your Touptek guider because you need its sensor and the DLSR sensor to be equidistant from the OAG prism to get your image in focus and the guide star image in focus at the same time. OAG are a pain but eliminate differential flexure of a guide scope. It sounds like your just getting started. I would forgo the OAG in favor of a T-ring and T-adapter to use with your DSLR and take short exposures. Start with 30 seconds and increase by 10 seconds until you see star trailing to get an idea of your maximum exposure with your current gear.The t-ring clicks into your DLSR and the t-adapter threads to the back of the scope and at one end and screws into the t-tring. T-ring: https://www.amazon.com/Celestron-93419-T-Ring-Canon-Camera/dp/B000237C9M/ref=pd_sim_421_1?_encoding=UTF8&pd_rd_i=B000237C9M&pd_rd_r=G5FZ4YN6FR2F3EG6YV0V&pd_rd_w=tJEeO&pd_rd_wg=1SdxD&psc=1&refRID=G5FZ4YN6FR2F3EG6YV0VT-adapter: https://www.amazon.com/Celestron-T-adapter-Schmidt-Cassegrains-Threads-Cell/dp/B00009X3V8/ref=sr_1_1?ie=UTF8&qid=1491367482&sr=8-1&keywords=93633-AYou're ankle deep right now and it doesn't take much to be in the deep end and spending lots of money. Even for entry level items. My camera is entry level and it cost $2000. Then you add filters and a filter wheel and OAG and now your at $3500. Not trying to discourage you but try out the simple short exposures before spending the time and money you need to invest for long-exposure astrophotography.Go here for detailed information (registration required):www.cloudynights.comwww.stargazerslounge.com ## Frequently Bought Together - Celestron 93648 Deluxe Off-Axis Guider (Black) - Celestron 93644 EdgeHD 8" Telescope Photo Adapter, Black - Celestron .7X Reducer Lens EdgeHD 800 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ae/products/440457-celestron-off-axis-guider-for-long-exposure-astrophotography](https://www.desertcart.ae/products/440457-celestron-off-axis-guider-for-long-exposure-astrophotography) --- *Product available on Desertcart United Arab Emirates* *Store origin: AE* *Last updated: 2026-09-18*