--- product_id: 323397172 title: "Extension Tube M42x0.75 on Both Sides Length T2 Extension Tube Kit Length 5mm 10mm 15mm 20mm" brand: "svbony" price: "1760656β‚«" currency: VND in_stock: true reviews_count: 5 category: "Svbony" url: https://www.desertcart.vn/products/323397172-extension-tube-m42x0-75-on-both-sides-length-t2-extension store_origin: VN region: Vietnam --- # Four tube lengths: 5,10,15,20mm Precision M42x0.75 threading Durable anodized aluminum build Extension Tube M42x0.75 on Both Sides Length T2 Extension Tube Kit Length 5mm 10mm 15mm 20mm **Brand:** svbony **Price:** 1760656β‚« **Availability:** βœ… In Stock ## Summary > πŸ”­ Elevate your astrophotography game with precision and durability! ## Quick Answers - **What is this?** Extension Tube M42x0.75 on Both Sides Length T2 Extension Tube Kit Length 5mm 10mm 15mm 20mm by svbony - **How much does it cost?** 1760656β‚« 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/323397172-extension-tube-m42x0-75-on-both-sides-length-t2-extension) ## 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 - β€’ **Built to Last:** Fully metal, anodized aluminum construction ensures durability for years of astrophotography adventures. - β€’ **Trusted by Pros:** Highly rated by astrophotographers for precision and valueβ€”join the community capturing the cosmos. - β€’ **Customizable Extension:** Choose from 5mm, 10mm, 15mm, or 20mm tubes to achieve the perfect image scale and focus. - β€’ **Seamless Compatibility:** T2 interior & exterior threads solve spacing & focusing challenges effortlessly. - β€’ **Reflection-Free Imaging:** Fully threaded interior minimizes reflections, delivering crisp, clear shots every time. ## Overview The SVBONY T2 Extension Tube Kit features fully anodized aluminum tubes with precise M42x0.75 male and female threads on both ends, available in four lengths (5mm, 10mm, 15mm, 20mm). Designed to optimize spacing for reducers and field flatteners, it eliminates focusing issues in astrophotography setups. Its fully threaded interior reduces reflections, ensuring sharper images. Durable and compatible with a wide range of M42x0.75 camera and telescope accessories, this kit is a must-have for serious astrophotographers seeking customizable extension solutions. ## Description Specification SVBONY extension tube kit provides extra focuser viewing through telescope or for astrophotographic applications Machined and anodized aluminum tube;the inside of the adapter is fully threaded to minimize reflections Fully metal construction and anodizing aluminum process, durable for long time use Use this extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners The extension tube has a T2 interior thread and a T2 exterior thread for solving spacing problems in astrophotography and eliminates a range of focusing problemsFeatures: Type: Astronomical T2 thread Extension Tube Male thread: M42x0.75mm Female thread: M42x0.75mm Link or extend tube length of the M42x0.75 Products Length: 5mm 10mm 15mm 20mmPackage includes 1xT2 thread extension tube kit Review: Great quality and value. Unfortunately, the 5 mm and the 10mm are stuck together. I tried filter wrenches to separate them, which didn't work, so I wrapped them in tape and used pipe wrenches, but that still didn’t work. I will assemble everything tomorrow that I purchased it for, and we will see if I need them separated. I also bought the Variable Extension Tube, so I hope to use it to achieve the precise length I need. Just an update SVBONY reached out to me offering a refund on this product. I was very impressed. I planned to order another set and a few other items they make because the quality and value are very good, and that gesture made me a definite SVBONY customer. Review: Perfect for my needs to get a better focal length for astrophotography ## Features - Fully metal construction and anodizing aluminum process;durable for long time use - Use this extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners - T2 interior thread and T2 exterior thread for solving spacing problems in astrophotography and eliminates a range of focusing problems - Astronomical T2 thread extension tube;male thread:M42x0.75mm;female thread: M42x0.75mm - Link or extend tube length of the M42*0.75 products;Male thread;M42*0.75mm ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07BKYQF1H | | Additional Features | Extension Tube M42x0.75 | | Best Sellers Rank | #189,096 in Electronics ( See Top 100 in Electronics ) #160 in Telescope Photo Adapters | | Brand | SVBONY | | Coating | Fully Coated | | Compatible Devices | Cameras with M42x0.75 thread | | Customer Reviews | 4.5 4.5 out of 5 stars (194) | | Eye Piece Lens Description | NO | | Field Of View | 1.71 Degrees | | Finderscope | Reflex | | Focal Length Description | 15 millimeters | | Focus Type | Manual Focus | | Item Dimensions D x W x H | 6.1D x 6.1W x 5.1H centimeters | | Item Weight | 0.13 Pounds | | Manufacturer | SVBONY | | Manufacturer Part Number | FUSF9160A | | Model Name | T2 thread extension tube kit | | Model Number | FUSF9160A | | Mount | M42x0.75 | | Objective Lens Diameter | 20 Millimeters | | Optical-Tube Length | 20 Millimeters | | Power Source | Manual Operation | | UPC | 609378746406 | | Unit Count | 1 Count | ## Product Details - **Brand:** SVBONY - **Eye piece lens description:** NO - **Model name:** T2 thread extension tube kit - **Objective lens diameter:** 20 Millimeters - **Optical tube length:** 20 Millimeters ## Images ![Extension Tube M42x0.75 on Both Sides Length T2 Extension Tube Kit Length 5mm 10mm 15mm 20mm - Image 1](https://m.media-amazon.com/images/I/61vwE6mP6PL.jpg) ## Questions & Answers **Q: will this product fit the SV305 pro?** A: I'd contact SyBony directly - they make both the SV305 camera and this helicoid. The "1/25in" spec is common for telescope eyepiece accessories including cameras, but this version (they make others) of the helicoid has 42x0.75mm threads (T-mount) on both sides, implying another model or an additional adapter. **Q: what is the outside diameter?** A: Dear customer , Thanks for your contact. 1.77inch. 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: Will this fit on my 1.25" eyepiece / camera?** A: Dear customer , Thanks for your contact. SVBONY Extension Tube has M42x0.75 male thread and M42x0.75 female thread. It cannot be directly connected to the 1.25-inch eyepiece, but can be connected to the camera through an adapter ring. Generally used to solve spacing problems in astrophotography. 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 ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by S***B on 13 December 2025* Great quality and value. Unfortunately, the 5 mm and the 10mm are stuck together. I tried filter wrenches to separate them, which didn't work, so I wrapped them in tape and used pipe wrenches, but that still didn’t work. I will assemble everything tomorrow that I purchased it for, and we will see if I need them separated. I also bought the Variable Extension Tube, so I hope to use it to achieve the precise length I need. Just an update SVBONY reached out to me offering a refund on this product. I was very impressed. I planned to order another set and a few other items they make because the quality and value are very good, and that gesture made me a definite SVBONY customer. ### ⭐⭐⭐⭐⭐ Review *by K***S on 10 May 2025* Perfect for my needs to get a better focal length for astrophotography ### ⭐⭐⭐ Review *by M***I on 6 April 2024* It stays loose at the end of threading. Threads perfectly on my Player One though --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vn/products/323397172-extension-tube-m42x0-75-on-both-sides-length-t2-extension](https://www.desertcart.vn/products/323397172-extension-tube-m42x0-75-on-both-sides-length-t2-extension) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-19*