--- product_id: 248502082 title: "Telescope Focal Reducer 1.25” 0.25X Focal Reducer with C-Mount" brand: "svbony" price: "$75.74" currency: USD in_stock: true reviews_count: 6 category: "Svbony" url: https://www.desertcart.us/products/248502082-telescope-focal-reducer-1-25-0-25x-focal-reducer-c store_origin: US region: United States of America --- # 0.5x focal reduction for wider views Fully threaded C-mount adapter for secure fit Broadband green coated lens reduces reflections Telescope Focal Reducer 1.25” 0.25X Focal Reducer with C-Mount **Brand:** svbony **Price:** $75.74 **Availability:** βœ… In Stock ## Summary > πŸ”­ Capture the cosmos like a proβ€”wider, sharper, faster! ## Quick Answers - **What is this?** Telescope Focal Reducer 1.25” 0.25X Focal Reducer with C-Mount by svbony - **How much does it cost?** $75.74 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/248502082-telescope-focal-reducer-1-25-0-25x-focal-reducer-c) ## 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€’ **Universal 1.25" Fit:** Fits standard telescope focusers, making setup effortless and compatible with most gear. - β€’ **Durable All-Metal Build:** Robust aluminum alloy construction guarantees longevity and professional-grade performance. - β€’ **Sharper, Clearer Images:** Broadband green coating minimizes stray light and boosts contrast for stunning clarity. - β€’ **Expand Your Cosmic Canvas:** 0.5x focal reducer doubles your field of view for breathtaking wide-angle shots. - β€’ **Seamless Camera Integration:** Precision C-mount threading ensures a rock-solid connection with your video camera. ## Overview The SVBONY 0.5x Focal Reducer with C-Mount adapter transforms your telescope setup by doubling your field of view and enabling prime focus photography with compatible C-mount video cameras. Featuring a fully threaded design and broadband green coated optical lens, it minimizes reflections and enhances image contrast. Its durable all-metal construction and universal 1.25" barrel size make it a must-have for serious astrophotographers seeking wider, clearer celestial shots. ## Description Product description This adapter make you attach your video camera with a 'C' or 'CS' thread to your telescope for prime focus photography. C-threads are commonly used in most consumer video cameras whereas the CS thread is mostly used in security cameras. The camera must have a standard removable C-mount lens, which is a 1" diameter thread. Will not work on video cameras with a fixed lenses or bayonet mount. Useway: attach the camera to the C-thread of this adapter. Then slide the 1.25" barrel into your 1.25" telescope focuser and you are ready to shoot. Internally grooved to reduce stray light reflection for maximum contrastSpecifications: Focal Reducer: 0.5x Barrel Size: 1.25"/31.7mm Thread Interface: Male C-mount at top and female M28.5x0.6 thread at the rear end Sleeve Material: Full metal aluminum alloy Lens Coated: Broadband green coated Lens Material: Pure optical lens Color: BlackPackage Includes: 1 x SVBONY 0.5x Focal Reducer Safety Warning Don't look directly into the sun;or it will burn your eyes Review: Performs to specification. - Performs as required Review: Works great, well priced. - Works well for terrestrial viewing, I will try it on the moon soon... ## Features - This item will adapt the Focal Reducer to a standard C-mount video camera - The threads at the bottom of the c-mount adapter fit the threads on the focal reducer - The threads at the top fit the C-mount on your camera - The unit then fits into a standard 1.25" focus tube. This adapter and our focal reducer give you a much faster system with a larger field of view - This item including one C-mount adapter and one 0.5x focuser reducer lens; inside of the adapter is fully threaded to minimize reflections ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07MG3792W | | Best Sellers Rank | 1,282 in Telescope Accessories | | Brand | SVBONY | | Brand Name | SVBONY | | Coating | Broadband green coated | | Compatible Devices | Video Cameras with C-mount or CS-mount | | Customer Reviews | 4.2 out of 5 stars 39 Reviews | | Exit Pupil Diameter | 0.63 Inches | | Eye Piece Lens Description | Broadband Green Coated | | Eye piece lens description | Broadband Green Coated | | Field Of View | 2.5 Degrees | | Finderscope | Reflex | | Focal Length Description | 0.5x reduction | | Focus Type | Manual Focus | | Item Dimensions D x W x H | 48D x 48W x 48H millimetres | | Item Highlight | Adapter to CCD Camera, for Telescope Eyepiece Photography, Internal Threaded Design, Broadband Green Coated Lens | | Item Weight | 0.04 Kilograms | | Manufacturer | SVBONY | | Manufacturer Part Number | FW2159A-F9154A | | Model Number | FW2159A-F9154A | | Mount | 1.25 inches mount | | Number of Items | 1 | | Number of Packs | 1 | | Objective Lens Diameter | 31.75 Millimetres | | Objective lens diameter | 31.75 Millimetres | | Optical tube length | 1.25 inches | | Optical-Tube Length | 1.25 inches | | Product Features | Fully threaded interior to minimize reflections | | Product dimensions | 48D x 48W x 48H millimetres | | Telescope mount description | 1.25 inches mount | | Zoom Ratio | 2:1 | ## Product Details - **Brand:** Svbony - **Optical tube length:** 1.25 inches - **Eye piece lens description:** Broadband Green Coated - **Telescope mount description:** 1.25 inches mount - **Product dimensions:** 48D x 48W x 48H millimetres - **Focus type:** Manual Focus - **Finderscope:** Reflex - **Item weight:** 0.04 Kilograms - **Compatible devices:** Camera - **Lens coating description:** Broadband green coated ## Images ![Telescope Focal Reducer 1.25” 0.25X Focal Reducer with C-Mount - Image 1](https://m.media-amazon.com/images/I/61-Sf8xbFTL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Performs to specification. *by P***T on 6 September 2025* Performs as required ### ⭐⭐⭐⭐⭐ Works great, well priced. *by S***I on 6 August 2025* Works well for terrestrial viewing, I will try it on the moon soon... ### ⭐⭐⭐⭐⭐ Best at f/7 or higher. I used a 20mm extension tube to get close to 0.5 on my ASI120 camera. *by J***Y on 1 August 2022* I bought this to try to widen the star field on my f/4 guidescope. Three things I learned 1) focal reducers work at f/7 or higher. 2) The back focus for 0.5 is around 32-37mm. 3) This works nicely when screwed onto an eyepiece. ## Frequently Bought Together - SVBONY Reducer for Telescope 1.25 inches 0.5X Focal Reducer with C-Mount Adapter to CCD Camera for Telescope Eyepiece Photography and Observing - SVBONY Reticle Eyepiece 1.25 inches Illuminated Eyepiece 12.5mm Double-line Crosshair LED Illuminator 40 Degree FOV 4 Elements Design Telescope Accessory Guide Star --- ## 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.us/products/248502082-telescope-focal-reducer-1-25-0-25x-focal-reducer-c](https://www.desertcart.us/products/248502082-telescope-focal-reducer-1-25-0-25x-focal-reducer-c) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-09*