--- product_id: 440457 title: "93648 Deluxe Off-Axis Guider, Black" brand: "celestron" price: "84647 kr" currency: ISK in_stock: true reviews_count: 11 category: "Celestron" url: https://www.desertcart.is/products/440457-93648-deluxe-off-axis-guider-black store_origin: IS region: Iceland --- # 8mm helical focuser travel 48mm clear aperture Includes multiple adapters 93648 Deluxe Off-Axis Guider, Black **Brand:** celestron **Price:** 84647 kr **Availability:** ✅ In Stock ## Summary > 🔭 Guide like a pro, capture like a legend. ## Quick Answers - **What is this?** 93648 Deluxe Off-Axis Guider, Black by celestron - **How much does it cost?** 84647 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/440457-93648-deluxe-off-axis-guider-black) ## 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 - • **Full Frame Friendly:** 48mm clear aperture supports full-frame cameras without vignetting, maximizing your imaging potential. - • **Plug & Play Versatility:** Comes with all essential adapters for DSLR, Nightscape CCD, and popular astroimaging cameras—no extra hassle or expense. - • **Effortless Focus Control:** Fixed-orientation helical focuser delivers smooth, twist-free adjustments to keep your autoguider perfectly sharp. - • **Trusted Legacy & Support:** Backed by Celestron’s 2-year US warranty and expert support from a brand trusted since 1960. - • **Pinpoint Precision Guiding:** Large 12.5mm multi-coated prism ensures brighter guide stars and ultra-accurate tracking for flawless astroimages. ## Overview The Celestron 93648 Deluxe Off-Axis Guider is a premium astroimaging accessory designed for long focal length telescopes. Featuring a large 12.5mm multi-coated prism, an 8mm fixed-orientation helical focuser, and a 48mm clear aperture, it enables precise guiding with minimal vignetting. Included adapters support DSLR, Nightscape CCD, and other popular cameras, making setup seamless. Trusted by professionals and backed by a 2-year US warranty, it’s the ultimate tool for capturing sharp, round stars and flawless deep-sky images. ## 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 Review: Great big prism, works nicely - I use this on a C11 EdgeHD, with a full frame imaging camera. The prism for the guiding camera, relative to competitors, is very large and so it is much easier to find a guide star. It comes with a nice collection of adapters to the scope side and camera side (though it should come with a wider 3.28" scope side adapter, that Celestron now sells separately). It is also easy to rotate the camera (guide and imaging) separately, or collectively, by loosening a couple screws. On the downside -- adjusting the prism position (how far down into the frame) is rather tedious. Not hard, just tedious. Fortunately you should have to do it only once. The other downside - partly because of all the other features -- is that it adds quite a bit of backfocus, which may be an issue on some SCT's especially if you want separate focus, filter wheels, etc. But overall, well built and does what it should. Review: Weird rate features - "warmth" and "thickness" w>? - besides those irrelevant ratings categories on desertcart I like it very much, it's a substantial piece of equipment. double edged sword there - that means it's also heavy. with a lot of digging I found out it's 18 ounces. just over a pound - that information is not very freely advertised but if you're buying this in the first place you'll already know that the weight of the item is very important. It does have a lot of bells and whistles included for increasing your focusing distance and adapters for various threads, plus a top focus ring for your guider cam which is a very helpful inclusion vs trying to just set the cam in and out trying to match focus. I personally find the prism up to the guide a bit dim, but I guess that's to be expected from a diagonal. All in all I found it to be pretty solid, I had another off axis from a brand I can't mention that was pretty flimsy and difficult to focus and this was definitely a step up. ## 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 | #25 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 | 4.1 4.1 out of 5 stars (106) | | Eye Piece Lens Description | Fiber Optic | | Finderscope | Reflex | | Focal Length Description | 48 millimeters | | Focus Type | Manual Focus | | Global Trade Identification Number | 00050234936484 | | Item Weight | 0.8 Kilograms | | Manufacturer | Celestron | | Manufacturer Part Number | 93648-CGL | | Model Name | Deluxe Off-Axis Guider | | Model Number | 93648-CGL | | Mount | Altazimuth Mount | | Objective Lens Diameter | 42 Millimeters | | Optical-Tube Length | 70 Millimeters | | UPC | 050234936484 | | Warranty Description | ELESTRON TWO YEAR LIMITED WARRANTY | ## Product Details - **Brand:** Celestron - **Compatible Devices:** [DSLR cameras, Nightscape CCD cameras, Telescopes with SCT/EdgeHD, M42 T-thread, M48 connections] - **Eye Piece Lens Description:** Fiber Optic - **Finderscope:** Reflex - **Focus Type:** Manual Focus - **Item Weight:** 0.8 Kilograms - **Model Name:** Deluxe Off-Axis Guider - **Objective Lens Diameter:** 42 Millimeters - **Optical Tube Length:** 70 Millimeters - **Telescope Mount Description:** Altazimuth Mount ## Images ![93648 Deluxe Off-Axis Guider, Black - Image 1](https://m.media-amazon.com/images/I/51qAoWHlJ1L.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 ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great big prism, works nicely *by L***D on October 3, 2020* I use this on a C11 EdgeHD, with a full frame imaging camera. The prism for the guiding camera, relative to competitors, is very large and so it is much easier to find a guide star. It comes with a nice collection of adapters to the scope side and camera side (though it should come with a wider 3.28" scope side adapter, that Celestron now sells separately). It is also easy to rotate the camera (guide and imaging) separately, or collectively, by loosening a couple screws. On the downside -- adjusting the prism position (how far down into the frame) is rather tedious. Not hard, just tedious. Fortunately you should have to do it only once. The other downside - partly because of all the other features -- is that it adds quite a bit of backfocus, which may be an issue on some SCT's especially if you want separate focus, filter wheels, etc. But overall, well built and does what it should. ### ⭐⭐⭐⭐⭐ Weird rate features - "warmth" and "thickness" w>? *by J***G on September 8, 2020* besides those irrelevant ratings categories on amazon I like it very much, it's a substantial piece of equipment. double edged sword there - that means it's also heavy. with a lot of digging I found out it's 18 ounces. just over a pound - that information is not very freely advertised but if you're buying this in the first place you'll already know that the weight of the item is very important. It does have a lot of bells and whistles included for increasing your focusing distance and adapters for various threads, plus a top focus ring for your guider cam which is a very helpful inclusion vs trying to just set the cam in and out trying to match focus. I personally find the prism up to the guide a bit dim, but I guess that's to be expected from a diagonal. All in all I found it to be pretty solid, I had another off axis from a brand I can't mention that was pretty flimsy and difficult to focus and this was definitely a step up. ### ⭐⭐⭐⭐⭐ Great for SCT astrophotography - awesome product support *by B***N on December 7, 2018* I like this product a lot. I didn't at first, but I purchased it for use in a Celestron SCT, since installing a guide scope on the side of the scope tended make the vertical balance in dec difficult (read: impossible) to achieve without adding additional weights to the scope to balance it. The Celestron OAG makes vertical balance in dec easy to achieve, because it keeps most of the weight of imaging and guiding cameras along close to the radial axis of the optical tube. The weight of a 9.25" SCT optical tube alone is about 20 lbs, which is within 2 or 3 lbs of the (actual) load limit of the Celestron AVX mount. I don't recommend AVX + 9.25" SCT, because if it is at all breezy, or one wants to add something like a filter wheel, one runs a significant risk of getting a bunch of astropix with unstackable content (elongated stars, with long periods of backlash recovery and jiggly star streams in several shots). I'm just saying that the OAG was the only way I was able to use the AVX + 9.25" SCT combo. I finally ended up getting a more robust CGX mount, which is 10 times the price of the OAG, but also I am now happy to have the OAG available, since it simplifies the weight and cable management of the mount. The hardest part of dealing with the OAG is when you first set it up, because you have to bring your imaging and guiding cameras to focus together. This can take a while as you work your way through the various adapters and combinations provided. Once this is done, though, it is possible to treat the whole conglomeration of OAG, imager, and guider as a single attachment for your telescope (just lock the focus of the guider with a set screw before disassembling), which is always at or near focus once it is attached. Saves a lot of time in the field. If you have more than one combination of telescope, imager, and guider that you want to use the OAG for, you either must go through the headache of parallel focusing the components, or, if you are wealthy (enough), I suppose you could get a dedicated OAG for each combination. Be careful when adjusting the height of the pick-off prism that relays some light to the guide camera. The prism can drop off, and getting it back on is a HUGE headache (Celestron allowed me to RMA mine when the prism dropped off, even though it was entirely my fault that this had happened; for this, they have earned a rating of totally awesome for life; they didn't have to honor the warranty, but they did). It turns out that the prism height was optimal to begin with, so that was a totally unnecessary adventure. One feature that this OAG has, which you won't find in most, is the ability to rotate the imager (and, separately, guide camera) very easily. Other things I like is the fact that it keeps the imager close to the guide camera. I use a ZWO camera that has a built-in USB hub, so I can attach the guide camera and filter wheel with two six-inch USB2 cables that run from the ZWO hub, which keeps everything neat and tidy, and easy to balance. All in all, this is a great solution for SCT deep-sky astrophotography. In retrospect, I believe the reason I didn't like the OAG when I first got it is that it required me to change a lot of preconceptions I had about the relationship and positioning of equipment on the mount. The fact that Celestron replaced the OAG that I myself had damaged brings my rating to 5 stars. ## 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.is/products/440457-93648-deluxe-off-axis-guider-black](https://www.desertcart.is/products/440457-93648-deluxe-off-axis-guider-black) --- *Product available on Desertcart Iceland* *Store origin: IS* *Last updated: 2026-04-28*