--- product_id: 317867458 title: "SVBONY SV157 Extension Tube 1.25 inch Optical Length 40mm Total Length 70mm Extension Tube for Telescope (70mm)" brand: "svbony" price: "VT12187" currency: VUV in_stock: true reviews_count: 5 category: "Svbony" url: https://www.desertcart.vu/products/317867458-svbony-sv157-extension-tube-1-25-inch-optical-length-40mm store_origin: VU region: Vanuatu --- # threaded for 1.25" filters & eyepieces 70mm precision extension length all-metal durable aluminum alloy SVBONY SV157 Extension Tube 1.25 inch Optical Length 40mm Total Length 70mm Extension Tube for Telescope (70mm) **Brand:** svbony **Price:** VT12187 **Availability:** ✅ In Stock ## Summary > 🔭 Elevate your stargazing game with precision and durability! ## Quick Answers - **What is this?** SVBONY SV157 Extension Tube 1.25 inch Optical Length 40mm Total Length 70mm Extension Tube for Telescope (70mm) by svbony - **How much does it cost?** VT12187 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/317867458-svbony-sv157-extension-tube-1-25-inch-optical-length-40mm) ## 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 - • **Rugged All-Metal Build:** Crafted from anodized aluminum alloy for long-lasting durability and premium feel. - • **Perfect Focus Extension:** Achieve flawless camera and eyepiece focus with a precise 70mm optical length. - • **Secure Brass Compression:** Brass compression ring ensures a tight, scratch-free grip on your telescope accessories. - • **Anti-Reflection Threading:** Full internal threads reduce stray light, enhancing image clarity and contrast. - • **Seamless Filter Compatibility:** Threaded end fits standard 1.25" astrophotography filters for versatile setups. ## Overview The SVBONY SV157 is a 1.25" extension tube designed to optimize focus for cameras and eyepieces on telescopes. Made from high-quality anodized aluminum alloy, it features a 70mm optical length and threaded ends compatible with standard 1.25" filters. Its full internal threading minimizes reflected light, while a brass compression ring secures accessories without damage, making it a reliable upgrade for astrophotography and observation setups. ## Description Everyone who likes astronomy knows:Sometimes you cannot get to the right focal plane for focusing with a camera or eyepiece. Now SV157 extension tube can solve your problem. Built with metal material Machined of high quality aluminum and anodized black, durable for long time use Compatible with 1.25" telescope focusers Fits in 1.25" telescope focusers, and accepts 1.25" eyepieces or accessories.Threaded for use with standard 1.25 Inch astrophotography filters Specifications: Material: Aluminum Alloy 1.25" Extension Tube L=70mm Dimensions (mm):ɸ39*70 mm Weight (g): 47g/0.1lb Package Includes: 1×SVBONY SV157 1.25 " Extension Tube Review: I needed an extension tube so my QHY 5-II-M camera wouldn't fall out the back of my Orion 50mm mini guide scope. Even with the nose extension, I only had 1/4" of the camera in the scope in order to achieve focus. I have several SVBONY products and while they are definitely "entry level" in price, they have all performed exactly as promised and as needed. The extension tube is no exception. The fit is perfect, the finish looks fine and the threaded bolt to tighten the brass band that hold the guide camera in pace tuns smoothly and holds the camera without any play. I'm very happy with this fordable solution to my guide camera back focus dilemma. I highly recommend this product if you need an 1.25" extension tube. Review: Excelente producto, calidad superior, bonito diseño y color, llegó super rápido, gracias!!!!! ## Features - SV157 1.25" extension tube can help your eyepiece and camera focus well;Let you enjoy more beautiful scenery - Can install filters; SV157 1.25" extension tube is threaded at the end to accommodate a standard 1.25" filter - High-quality design; SV157 1.25" extension tube is made of all-metal material and has a long service life - Humanized bottom thread; The inside of the SV157 has full threads to reduce reflected light - With a brass compression; with a brass compression insh to prevent the marring of your telescope accessories ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B083TQHTLG | | Additional Features | Extension tube functionality for better camera/eyepiece focus | | Best Sellers Rank | #80,435 in Electronics ( See Top 100 in Electronics ) #41 in Telescope Photo Adapters | | Brand | SVBONY | | Compatible Devices | Camera, Eyepiece | | Customer Reviews | 4.6 4.6 out of 5 stars (121) | | Eye Piece Lens Description | Plossl | | Finderscope | Reflex | | Focal Length Description | 70 millimeters | | Focus Type | Manual Focus | | Item Dimensions D x W x H | 10.2D x 5.1W x 5.1H centimeters | | Item Weight | 47 Grams | | Manufacturer | SVBONY | | Manufacturer Part Number | FW9118B | | Model Name | SV157 | | Model Number | FUSW9118B | | Mount | 1.25 inches mount | | Objective Lens Diameter | 70 Millimeters | | Power Source | Manual operation without external power supply | ## Product Details - **Brand:** SVBONY - **Eye piece lens description:** Plossl - **Model name:** SV157 - **Objective lens diameter:** 70 Millimeters - **Telescope mount description:** 1.25 inches mount ## Images ![SVBONY SV157 Extension Tube 1.25 inch Optical Length 40mm Total Length 70mm Extension Tube for Telescope (70mm) - Image 1](https://m.media-amazon.com/images/I/51TcAA+X2EL.jpg) ![SVBONY SV157 Extension Tube 1.25 inch Optical Length 40mm Total Length 70mm Extension Tube for Telescope (70mm) - Image 2](https://m.media-amazon.com/images/I/61Tzw9s80nL.jpg) ![SVBONY SV157 Extension Tube 1.25 inch Optical Length 40mm Total Length 70mm Extension Tube for Telescope (70mm) - Image 3](https://m.media-amazon.com/images/I/51AN4yBDTxL.jpg) ![SVBONY SV157 Extension Tube 1.25 inch Optical Length 40mm Total Length 70mm Extension Tube for Telescope (70mm) - Image 4](https://m.media-amazon.com/images/I/61qZBPyDGzL.jpg) ![SVBONY SV157 Extension Tube 1.25 inch Optical Length 40mm Total Length 70mm Extension Tube for Telescope (70mm) - Image 5](https://m.media-amazon.com/images/I/61gslkrZOjL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by L***C on 14 April 2022* I needed an extension tube so my QHY 5-II-M camera wouldn't fall out the back of my Orion 50mm mini guide scope. Even with the nose extension, I only had 1/4" of the camera in the scope in order to achieve focus. I have several SVBONY products and while they are definitely "entry level" in price, they have all performed exactly as promised and as needed. The extension tube is no exception. The fit is perfect, the finish looks fine and the threaded bolt to tighten the brass band that hold the guide camera in pace tuns smoothly and holds the camera without any play. I'm very happy with this fordable solution to my guide camera back focus dilemma. I highly recommend this product if you need an 1.25" extension tube. ### ⭐⭐⭐⭐⭐ Review *by A***R on 22 July 2024* Excelente producto, calidad superior, bonito diseño y color, llegó super rápido, gracias!!!!! ### ⭐⭐⭐⭐⭐ Review *by G***. on 20 March 2026* Bought 2, for 2 Svbony 50mm guide scopes that needed extra back focus to stop my guide cams hanging off the end! As expected solid kit and works as needed. ## Frequently Bought Together - SVBONY SV157 Extension Tube 1.25 inch Optical Length 40mm Total Length 70mm Extension Tube for Telescope (70mm) - SVBONY 0.5X Focal Reducer - 1.25 inches Fully Multi Coated for Telescope Eyepiece Photography and Observing --- ## 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.vu/products/317867458-svbony-sv157-extension-tube-1-25-inch-optical-length-40mm](https://www.desertcart.vu/products/317867458-svbony-sv157-extension-tube-1-25-inch-optical-length-40mm) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-11*