--- product_id: 67636928 title: "SVBONY 0.5X 1.25 Telescope Focal Reducer, 2-Element FMC Optics | Wider Imaging Field, Aluminum Alloy Body, Standard M28.5x0.6 Threads, for Telescope Eyepiece Photography and Observing" brand: "svbony" price: "¥6546" currency: JPY in_stock: true reviews_count: 12 url: https://www.desertcart.jp/products/67636928-svbony-0-5x-1-25-telescope-focal-reducer-2-element store_origin: JP region: Japan --- # 2-element fully multi-coated optics for max contrast 0.5x focal length reducer for wider FOV Durable full metal alloy body SVBONY 0.5X 1.25 Telescope Focal Reducer, 2-Element FMC Optics | Wider Imaging Field, Aluminum Alloy Body, Standard M28.5x0.6 Threads, for Telescope Eyepiece Photography and Observing **Brand:** svbony **Price:** ¥6546 **Availability:** ✅ In Stock ## Summary > 🌌 Unlock the Universe: See More, Shoot Faster, Shine Brighter! ## Quick Answers - **What is this?** SVBONY 0.5X 1.25 Telescope Focal Reducer, 2-Element FMC Optics | Wider Imaging Field, Aluminum Alloy Body, Standard M28.5x0.6 Threads, for Telescope Eyepiece Photography and Observing by svbony - **How much does it cost?** ¥6546 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/67636928-svbony-0-5x-1-25-telescope-focal-reducer-2-element) ## 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 - • **Seamless Compatibility:** Standard M28.5x0.6 threading fits most eyepieces and C/CS mount cameras for effortless astrophotography setup. - • **Expand Your Cosmic Canvas:** Halve your telescope’s focal length to capture breathtakingly wider celestial vistas. - • **Crystal-Clear Views Every Time:** Fully multi-coated FMC optics boost light transmission and contrast for stunningly sharp images. - • **From Visual to Imaging Mastery:** Perfect for both immersive visual observing and high-speed CCD or webcam astrophotography—capture the moon like never before. - • **Built to Last, Designed to Perform:** Robust aluminum alloy body ensures longevity and reliable performance under all observing conditions. ## Overview The SVBONY 0.5X 1.25 Telescope Focal Reducer is a precision-engineered accessory that halves your telescope’s focal length, dramatically widening your field of view. Featuring a durable aluminum alloy body and fully multi-coated 2-element FMC optics, it enhances image brightness and contrast while reducing exposure times for astrophotography. Compatible with standard M28.5x0.6 threads and C/CS mount cameras, it’s ideal for both visual observation and capturing expansive lunar and celestial images with ease. ## Description A wonderful tool for astrophotography telescopes: reduce exposure time and simplify astrophotography; suitable for shooting. Capture wider field of view; the focal reducer is good for visual use for a bigger FOV and is indispensable when CCD imaging. The case is made of metal, which better protects the product itself and prolongs its service life. FMC optical glass design 2 pieces of optical design, increase the light transmittance; the image is brighter and clearer. 2 element optical design with fully multi-coated optics. Fully anti-reflection coatings on all air-glass surfaces for increased contrast. Blackened edges and blackened interior to reduce scattering of stray light and maximize contrast. Fully metal for long time using. Besides the male thread, it also has female thread at the rear end to fit filters etc. 0.5X focal reducer is threaded for attaching to a C-Mount standard for C or CS mount CCTV type cameras with telescopes. Screw the reducer into C or CS mount CCTV type cameras and so double the size of the photographic image field. This lets you take images of much larger areas of the lunar surface. for example. The reducer is also great for taking videos of the Moon using your webcam. You can obtain even larger image fields with your astronomy webcam if you attach an extension tube (e.g. 25mm) between the reducer and camera. Increase the image field of your web camera. More lens speed. Use the reducer visually with an eyepiece. Also ideal for video astronomy. Record large areas of the moon's surface. 1 x SVBONY 0.5x Focal Reducer ## Features - 0.5x focal reducer cuts the telescopes focal length in 0.5 times of original's to get a wider field of view - Fully anti-reflection coatings on all air-glass surfaces for increased contrast - The focal reducer is great for visual use for a bigger FOV and is indispensable when CCD imaging - Fully metal structure design;both the ends of the interface part is 28.5x0.6 thread - Directly connect the interface to the eyepiece;there is a very good performance in both visual and photography ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B07923SJB4 | | Best Sellers Rank | #182,694 in Toys & Games (See Top 100 in Toys & Games) #2 in Kids' Telescope Accessories | | Brand | SVBONY | | Coating | Fully Multi Coated | | Compatible Devices | TELESCOPE | | Customer Reviews | 4.1 4.1 out of 5 stars (205) 4.1 out of 5 stars | | Exit Pupil Diameter | 6.4 centimeters | | Eye Piece Lens Description | FMC | | Finderscope | Reflex | | Focal Length Description | 20 millimeters | | Focus Type | Manual Focus | | Item Dimensions D X W X H | 2"D x 0.8"W x 2"H | | Item Weight | 18.14 g | | Manufacturer | SVBONY | | Manufacturer Part Number | FUSF9154A | | Model Name | FUSF9154A | | Model Number | FUSF9154A | | Mount | Equatorial Mount | | Objective Lens Diameter | 31.75 millimeters | | Optical Tube Length | 20 millimeters | | Power Source | focal reducer | | Upc | 609378745393 609378745546 | | 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 | | Zoom Ratio | 2:1 | ## Product Details - **Brand:** SVBONY - **Eye Piece Lens Description:** FMC - **Finderscope:** Reflex - **Focus Type:** Manual Focus - **Model Name:** FUSF9154A - **Objective Lens Diameter:** 31.75 millimeters - **Optical Tube Length:** 20 millimeters - **Power Source:** focal reducer - **Product Dimensions:** 2"D x 0.8"W x 2"H - **Telescope Mount Description:** Equatorial Mount ## Images ![SVBONY 0.5X 1.25 Telescope Focal Reducer, 2-Element FMC Optics | Wider Imaging Field, Aluminum Alloy Body, Standard M28.5x0.6 Threads, for Telescope Eyepiece Photography and Observing - Image 1](https://m.media-amazon.com/images/I/61xXnxB5hlL.jpg) ![SVBONY 0.5X 1.25 Telescope Focal Reducer, 2-Element FMC Optics | Wider Imaging Field, Aluminum Alloy Body, Standard M28.5x0.6 Threads, for Telescope Eyepiece Photography and Observing - Image 2](https://m.media-amazon.com/images/I/61+RKZGmCOL.jpg) ![SVBONY 0.5X 1.25 Telescope Focal Reducer, 2-Element FMC Optics | Wider Imaging Field, Aluminum Alloy Body, Standard M28.5x0.6 Threads, for Telescope Eyepiece Photography and Observing - Image 3](https://m.media-amazon.com/images/I/61cHf993P7L.jpg) ![SVBONY 0.5X 1.25 Telescope Focal Reducer, 2-Element FMC Optics | Wider Imaging Field, Aluminum Alloy Body, Standard M28.5x0.6 Threads, for Telescope Eyepiece Photography and Observing - Image 4](https://m.media-amazon.com/images/I/51bSjREzN2L.jpg) ![SVBONY 0.5X 1.25 Telescope Focal Reducer, 2-Element FMC Optics | Wider Imaging Field, Aluminum Alloy Body, Standard M28.5x0.6 Threads, for Telescope Eyepiece Photography and Observing - Image 5](https://m.media-amazon.com/images/I/61tUtqgj9iL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works but needs basic instructions for newbies. *by on Reviewed in the United States May 20, 2021* I had to call a few places to get this info:Take the stock lens off the camera. Don't use it with this thing on.Focusing can be touchy. On my Astro Fi 130 with a Pegasus focuser I found that I was overshooting the focus point and seeing nothing because the camera takes a few seconds to get a lock in Sharpcap plus the focuser has 20,650 steps. The range of steps between fuzzing out/seeing anything/fuzzing out again was 150 steps.Until I went from 0 to 20,650 at 100 step intervals waiting 5 seconds for Sharpcap each time, I couldn't even tell if it would ever work. Finally I got a fair shot of Vega..... I don't know if it's any good for a 5 inch reflector but...eh. ### ⭐⭐⭐⭐⭐ A great way to expand your field of view! *by on Reviewed in the United States November 29, 2024* This focal reducer screws into the nose of an astrophotography camera or 1.25" eyepiece. For visual use, it turns a 20mm eyepiece into a 40mm, both decreasing the magnification and increasing the field of view. In astrophotography, the focal reducers does that, but it also reduces the size of stars on the sensor by half, meaning you can image faster with a wider field of view. For example, an f/10 camera/scope is reduced to f/5 will image roughly six times faster (if my math is correct) because the focal reducer concentrates more photons on each well in the sensor. This focal reducer works well and gives a nice view. I highly recommend it! ### ⭐⭐⭐⭐ It works but with some caveats *by on Reviewed in the United States October 2, 2021* I bought this focal reducer with the hope that I could use it with my 6SE telescope and two digital cameras. The threads fit the 1.25" threads on my eye pieces and cameras with appropriate adapters. Fit was not a problem at all. I had no problem getting my image into focus using this reducer with the SV305 camera. However, I could not get the right distance to bring anything into clear focus using my Canon 450D dslr. I have not been able to find the right combination of adapters to make it work - I've tried. The best I could do was use an eyepiece projection adapter, but the vignette was terrible despite a focused image.This 0.5x focal reducer did increase the field of view for the sv305 camera. The center of the image is fantastic. I was able to actually use the sv305 with this focal reducer to capture smaller deep sky targets - see the photos of M2, M30 the Jellyfish cluster, and M27 the dumbbell nebula. Unfortunately the outer area suffers from distortion. Stars are elongated and chromatic distortions are present. A field flattener is needed to help correct this. Its not a fault of this particular focal reducer. Pretty much any focal reducer will have the same effect on its own.If you are looking to increase the field of view this focal reducer will work providing about a 50% increase in the field of view assuming you can get the fight focal distance. Just don't expect it to do miracles. Its not the same as the much more expensive field reducers with field flatteners and shouldn't be compared to them. For daytime images this actually works even better as the edge distortions are much less noticeable. ## Frequently Bought Together - SVBONY 0.5X Focal Reducer - 1.25 inches Fully Multi Coated for Telescope Eyepiece Photography and Observing - SVBONY Telescope Filter 1.25 inches UHC Filter Astrophotography to Improve The Image Contrast Reduces Light Pollution (1.25 inch) - SVBONY Telescope Filter, 1.25 inches UV IR Cut Block Filter, Multi Coated Infra Red Filter Keep Planetary Images Sharp, for CCD Digital Astrophotography --- ## 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.jp/products/67636928-svbony-0-5x-1-25-telescope-focal-reducer-2-element](https://www.desertcart.jp/products/67636928-svbony-0-5x-1-25-telescope-focal-reducer-2-element) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-01*