--- product_id: 235743645 title: "SV181 Rack and Pinion Focuser, 1.25 inch, Newtonian Reflector Focuser for Newtonian Reflector Telescope" brand: "svbony" price: "2410658₫" currency: VND in_stock: true reviews_count: 13 category: "Svbony" url: https://www.desertcart.vn/products/235743645-sv181-rack-and-pinion-focuser-1-25-inch-newtonian-reflector store_origin: VN region: Vietnam --- # fine-tune rack & pinion gear 65mm smooth travel dust cover protection SV181 Rack and Pinion Focuser, 1.25 inch, Newtonian Reflector Focuser for Newtonian Reflector Telescope **Brand:** svbony **Price:** 2410658₫ **Availability:** ✅ In Stock ## Summary > 🔭 Elevate your stargazing game with precision that’s out of this world! ## Quick Answers - **What is this?** SV181 Rack and Pinion Focuser, 1.25 inch, Newtonian Reflector Focuser for Newtonian Reflector Telescope by svbony - **How much does it cost?** 2410658₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/235743645-sv181-rack-and-pinion-focuser-1-25-inch-newtonian-reflector) ## Best For - svbony enthusiasts ## Why This Product - Trusted svbony brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Lightweight Yet Robust:** Crafted with metal base and nylon guide strips for wobble-free, smooth travel—upgrade your telescope’s performance effortlessly. - • **Precision Focus Control:** Helical cut rack & pinion gears deliver ultra-smooth, backlash-free adjustments for razor-sharp views. - • **Durable Brass Eyepiece Ring:** Internal brass ring secures your 1.25" eyepiece without leaving marks—premium protection meets precision. - • **Extended Equipment Lifespan:** Included 1.25" dust cover shields your focuser from dust and debris, ensuring long-term reliability. - • **Optimized Anti-Reflection Design:** Fully threaded internal matte finish minimizes stray light, enhancing image clarity and contrast. ## Overview The SVBONY SV181 Rack and Pinion Focuser is a high-quality 1.25-inch focuser designed for Newtonian reflector telescopes. Featuring a 65mm smooth travel range, helical cut gears for fine tuning, and a durable brass eyepiece ring, it ensures precise, wobble-free focusing. Its internal matte finish reduces reflections, while the included dust cover protects your investment, making it a top-tier upgrade for amateur astronomers seeking professional-grade performance. ## Description Product description Do you have focusing problems for your telescope? Do you want to give your reflector an accurate focuser? SVBONY SV181 Rack & Pinion Focuser for Newtonian reflector is coming! SV181 Rack and Pinion Focuser is suitable for 114mm and 150mm Newtonian reflector telescope. Package Includes 1x SV181 1.25" R&P Reflector Type Focuser 1x M4 Screw 1x M6 Screw Internal brass design A brass compression ring to prevent the marring of your telescope accessories;Internal brass ring that the set screw hits to hold your 1.25" eyepiece inside for eliminates marks on your eyepiece barrel Large and convenient knob You can also use it with gloves Matting thread Glare-threaded and flat-black interior ensures excellent contrast Locking thumb screws With an aluminum locking thumb screws to secure adjusted focus make sure it won't come loose High-quality manufacturing materials All metal construction and anodizing aluminum process; durable for long time use Dust cover SVBONY SV181Telescope focuser is with dust cover; which can effectively prevent dust from entering the lens body . Specifications Review: GREAT focuser - I replaced the focuser on my Orion 6" dob telescope. Researching I learned that all reflector scopes 6" and smaller share the same cheap sloppy focuser and this is the only one I could find to replace the cheapy. I did have to enlarge the drawtube hole with a rotary tool and drill 4 small holes to mount the base. I am mechanicaly inclined so that was no problem for me. The SVBony focuser is a qaulity unit consisting of a metal base and a far superior drawtube that fits tightly in the base and rides on nylon or delrin guide strips which makes its travel very smooth. The strips also take out all of the drawtube wobble and sloppy fit of the stock plastic focuser. The rack and pinion gears are helical cut and have much less gear backlash than the stock focuser. You cannot beat this focuser for the price period! This focuser is built every bit as good as the replacements sold costing over twice as much as this focuser. This focuser was my introduction to SVbony products and since I have purchased some of there eyepieces as well and boy was I surprised! Very good products indeed. I have no concerns buying SVbony parts and will continue doing so when they have something that I want. Thank you SVbony for bringing your products to the market. You have earned a loyal customer. Review: Lightweight well made - Well crafted perfect for telescope project , lightweight, great smooth operation! ## Features - Smooth SV181 Rack and Pinion Focuser for reflector telescopes accepts 1.25inches eyepieces - The gear can be fine tuning; You can adjust the focal length by the gear; Focuser Travel is 65mm; and fine tuning more accuracy - Brass ring design; Internal brass ring that the set screw hits to hold your 1.25inches eyepiece inside for eliminates marks on your eyepiece barrel - Internal matting design; the inside of the item fully threaded to minimize reflections - Come with 1.25 inch dust cover; It can protect your equipment from dust; Thereby extending the service life of the equipment ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08HX1MWMM | | Additional Features | Adjustable metal gear focuser, smooth focus with dual knobs, built-in brass ring, fully threaded interior | | Best Sellers Rank | #1,434 in Camera & Photo Products ( See Top 100 in Camera & Photo Products ) #26 in Telescope Reflectors | | Brand | SVBONY | | Coating | StarBright XLT | | Compatible Devices | Newtonian reflector telescope - 114mm, Newtonian reflector telescope - 150mm | | Customer Reviews | 4.3 out of 5 stars 104 Reviews | | Eye Piece Lens Description | Plossl | | Field Of View | 0.95 Degrees | | Finderscope | Reflex | | Focal Length Description | 65 millimeters | | Focus Type | Manual Focus | | Item Dimensions D x W x H | 5.7"D x 4.5"W x 4.1"H | | Item Weight | 410 Grams | | Manufacturer | SVBONY | | Manufacturer Part Number | FCAW9140A | | Model Name | SV181 | | Model Number | FCAW9140A | | Mount | 1.25 inches mount | | Objective Lens Diameter | 114 Millimeters | | Power Source | Manual | | Product Dimensions | 5.7"D x 4.5"W x 4.1"H | | Telescope Mount Description | 1.25 inches mount | | Unit Count | 1.0 Count | | Warranty Description | We provide 1 year warranty for SVBONY telescope accessories and 30 days no reason to return. Beyond the warranty period: We still offer maintain service, buyers are required to afford corresponding costs. We processed in the most hassle-free way possible.You just need to contact with us on Amazon ,we will reply you within 12 hours | ## Product Details - **Brand:** SVBONY - **Eye Piece Lens Description:** Plossl - **Finderscope:** Reflex - **Focus Type:** Manual Focus - **Item Weight:** 410 Grams - **Model Name:** SV181 - **Objective Lens Diameter:** 114 Millimeters - **Power Source:** Manual - **Product Dimensions:** 5.7"D x 4.5"W x 4.1"H - **Telescope Mount Description:** 1.25 inches mount ## Images ![SV181 Rack and Pinion Focuser, 1.25 inch, Newtonian Reflector Focuser for Newtonian Reflector Telescope - Image 1](https://m.media-amazon.com/images/I/61EQY4EPQtL.jpg) ![SV181 Rack and Pinion Focuser, 1.25 inch, Newtonian Reflector Focuser for Newtonian Reflector Telescope - Image 2](https://m.media-amazon.com/images/I/71RvNeam0JL.jpg) ![SV181 Rack and Pinion Focuser, 1.25 inch, Newtonian Reflector Focuser for Newtonian Reflector Telescope - Image 3](https://m.media-amazon.com/images/I/714IMvOSWLL.jpg) ![SV181 Rack and Pinion Focuser, 1.25 inch, Newtonian Reflector Focuser for Newtonian Reflector Telescope - Image 4](https://m.media-amazon.com/images/I/61bJksdGKhL.jpg) ![SV181 Rack and Pinion Focuser, 1.25 inch, Newtonian Reflector Focuser for Newtonian Reflector Telescope - Image 5](https://m.media-amazon.com/images/I/71kqNADttJL.jpg) ## Questions & Answers **Q: Will the sv181 fit on an orion xt6?** A: thanks so much for your question. Yes, this SVBONY SV181 Rack and Pinion Focuser is suitable for orion xt6. **Q: What is the width of the rack itself? I know the length is 64mm but I need to know the width** A: Dear customer , Thanks for your contact. 74mm. For accessories;we provide 2 months warranty;within 2 months;you can return for refund or replacement.If you have any other questions about warranty;please contact us freely;we will work with you win to win. If my reply still doesn't answer your question well or you want to know more details about this product, please contact us by message on Amazon. Because the customer's message can be seen in the first time on Amazon, and will solve the problem as soon as possible. Once I receive your response, I will try my best to answer your questions. Sincerely look forward to your reply. Best wishes ! Kelly **Q: How can I add a 1 1/4 inch UHC filter at the bottom of the threaded eyepiece barrel?** A: thanks for your question, This SVBONY SV181 Rack and Pinion Focuser does not have filter threads and cannot attach filters directly, you can add filters to the bottom of your eyepiece when inserting it. **Q: Will this fit on a celestron 130 slt?** A: thanks for your question. Yes, the SVBONY SV181 Rack and Pinion Focuser fit on a celestron 130 slt. If any, please concact us via amazon message, we are always here for you. ## Customer Reviews ### ⭐⭐⭐⭐⭐ GREAT focuser *by M***S on July 5, 2021* I replaced the focuser on my Orion 6" dob telescope. Researching I learned that all reflector scopes 6" and smaller share the same cheap sloppy focuser and this is the only one I could find to replace the cheapy. I did have to enlarge the drawtube hole with a rotary tool and drill 4 small holes to mount the base. I am mechanicaly inclined so that was no problem for me. The SVBony focuser is a qaulity unit consisting of a metal base and a far superior drawtube that fits tightly in the base and rides on nylon or delrin guide strips which makes its travel very smooth. The strips also take out all of the drawtube wobble and sloppy fit of the stock plastic focuser. The rack and pinion gears are helical cut and have much less gear backlash than the stock focuser. You cannot beat this focuser for the price period! This focuser is built every bit as good as the replacements sold costing over twice as much as this focuser. This focuser was my introduction to SVbony products and since I have purchased some of there eyepieces as well and boy was I surprised! Very good products indeed. I have no concerns buying SVbony parts and will continue doing so when they have something that I want. Thank you SVbony for bringing your products to the market. You have earned a loyal customer. ### ⭐⭐⭐⭐⭐ Lightweight well made *by N***0 on February 9, 2025* Well crafted perfect for telescope project , lightweight, great smooth operation! ### ⭐⭐⭐⭐ Deep penetration into the telescope *by R***E on February 20, 2023* Good cheep focuser for modifications. Iv'e added five photos. First there are photos with a ruler next to the focuser so you can see how much travel it has. With the focuser racked in all the way, it blocks light coming into the telescope. I don't need that much travel. I disassembled the focuser (third photo), cut 40 mm off the focuser tube and rack, and put it back together. I filled some of the rack threads with solder and drilled and countersunk a new hole for the screw. The screw threads are 2 mm x 0.4 mm. I got the tread tap off amazon. I also ground off the bottom of the focuser with an angle grinder and sand paper to make the focuser fit flat on my telescope box. I could have put some putty under the arch, but I needed the focuser to sit very low. Finally a photo of the old focuser and this new one on the telescope box. I will put the camera on the old focuser, and a cross hair recital eyepiece in the new one for guiding during photography. Also I want to mention that there are three little allen screws on one side around the silver thumbscrew. Two of them press a piece of plastic against the draw tube to tighten it up. The third keeps the plastic piece from falling out. ## Frequently Bought Together - SVBONY SV181 Rack and Pinion Focuser, 1.25 inch, Newtonian Reflector Focuser for Newtonian Reflector Telescope - SVBONY Telescope Lens 23mm Telescopes Eyepieces Wide Angle 62 Degree Aspheric Eyepiece Fully Coated Lens for 1.25 inches Astronomic Telescopes - Astronomical Telescope Accessories D114F900mm with Short-axis Secondary Mirror 25mm, Newton Reflector Spherical Mirror --- ## 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.vn/products/235743645-sv181-rack-and-pinion-focuser-1-25-inch-newtonian-reflector](https://www.desertcart.vn/products/235743645-sv181-rack-and-pinion-focuser-1-25-inch-newtonian-reflector) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-21*