--- product_id: 20883930 title: "Astromania O-III Filter 1.25inch Telescope Filter Narrowband Nebula Filters" brand: "astromania" price: "R2299" currency: ZAR in_stock: true category: "Astromania" url: https://www.desertcart.co.za/products/20883930-astromania-o-iii-filter-1-25inch-telescope-filter-narrowband-nebula store_origin: ZA region: South Africa --- # Blocks light pollution, enhances deep-sky views 95% O-III transmission for crisp nebula contrast 1.25" universal fit for most telescope eyepieces Astromania O-III Filter 1.25inch Telescope Filter Narrowband Nebula Filters **Brand:** astromania **Price:** R2299 **Availability:** ✅ In Stock ## Summary > 🌠 Make every nebula POP — See the unseen in your night sky! ## Quick Answers - **What is this?** Astromania O-III Filter 1.25inch Telescope Filter Narrowband Nebula Filters by astromania - **How much does it cost?** R2299 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/20883930-astromania-o-iii-filter-1-25inch-telescope-filter-narrowband-nebula) ## Best For - astromania enthusiasts ## Why This Product - Trusted astromania brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Nebulae in Stunning Contrast:** Selective O-III bandpass isolates 496-501nm double ionized oxygen lines for breathtaking nebula clarity. - • **Universal 1.25" Compatibility:** Seamlessly fits standard eyepieces, Barlow lenses, and camera adapters—upgrade any telescope instantly. - • **Light Pollution’s Worst Enemy:** Blocks nearly all other visible wavelengths, dramatically improving views even in city skies. - • **Perfect for Visual & Astrophotography:** Enhances faint nebulae contrast without brightening, ideal for both night sky explorers and long-exposure shooters. - • **Anti-Reflection Coating for Crystal Clarity:** Multi-coated glass eliminates glare and ghosting, delivering razor-sharp planetary nebula images. ## Overview The Astromania O-III 1.25" Filter is a premium narrowband filter designed to boost contrast of gaseous and planetary nebulae by transmitting 95% of the double ionized oxygen emission lines (496-501nm) while blocking nearly all other visible light. Its universal 1.25" threading fits most telescope eyepieces and accessories, making it a versatile tool for deep-sky observers and astrophotographers alike. With advanced multi-coatings to reduce glare and ghosting, this filter excels in both light-polluted urban environments and dark sky locations, delivering crisp, high-contrast views of faint nebulae and planetary details. ## Description desertcart.com : Astromania O-III Filter 1.25inch Telescope Filter Narrowband Nebula Filters | Light Pollution Filter for Astronomy Telescope, Fit 1.25" Eyepiece, Improve Image Contrast, For Orion Swan & Extended Nebulae : Electronics ## Features - This O-III filter enhances contrast during visual observation of gaseous and planetary nebulae; The 1.25" filter allows high-contrast imaging even in areas with strong light pollution for making it top choice for deep-sky observers and astrophotographers - Especially useful for large aperture telescopes through which Moon can be extremely overwhelming; It allows just the Double Ionized Oxygen lines between 496nm to 501nm to pass through at 95% for delivering superb contrast for faint nebulae - O-III filter completely blocks virtually all other visible wavelengths so views of nebulas are optimized; Increases contrast through selective filtration while anti-reflection coating prevents glaring & ghosting for crisp clear images of planetary nebulae - Telescope filter is made from high-grade glass with dichroic interference and antireflection coatings; Not only is it useful at light-polluted sites the contrast is also increased at dark sky sites and it can be used with all 1.25" eyepieces - Narrowband filters do not eliminate the effects of light pollution or increase the object’s brightness; In many cases they increase the contrast between nebula and night sky not brightening the nebula – so you get clearer more defined views of Nebulas - Whether capturing long-exposure astrophotography or simply enjoying night of visual stargazing this O-III filter enhances contrast of gaseous and planetary nebulae in all sky conditions; A must-have astronomy filter for your 1.25" telescope eyepieces - This 1.25 inch nebula filter fits virtually any standard telescope eyepiece Barlow lens or camera adapter; Perfect for most astronomical telescopes; Ideal for deep-sky observation planetary nebula hunting and city stargazing ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0141U979O | | Best Sellers Rank | #63 in Telescope Filters | | Brand | Astromania | | Built-In Media | 1 x 1.25 Inch O-III Filter | | Coating Description | Multi Coating | | Color | 1.25" O-III | | Compatible Devices | Telescopes with 1.25 inch filter threads | | Customer Reviews | 4.4 4.4 out of 5 stars (150) | | Enclosure Material | Aluminum, Optical Glass | | Item Dimensions L x W | 1.25"L x 1.25"W | | Item Highlight | Light Pollution Filter for Astronomy Telescope, Fit 1.25" Eyepiece, Improve Image Contrast, For Orion Swan & Extended Nebulae | | Item Weight | 8.53 g | | Manufacturer | Astromania | | Manufacturer Part Number | SKU_AM_OF1 | | Media Type | ProductImage | | Model Number | SKU_AM_OF1 | | Number of Items | 1 | | Photo Filter Size | 31.75 millimeters | | Screen Size | 1.25 inches | | Set Name | 1.25 Inch O-III Filter Set | | Special Effect | Enhancing | | Thread Size | 31.75 millimeters | | Water Resistance Level | Moisture Resistant | ## Product Details - **Brand:** Astromania - **Coating Description:** Multi Coating - **Material:** Aluminum, Optical Glass - **Number of Items:** 1 - **Photo Filter Effect Type:** Enhancing - **Photo Filter Size:** 31.75 millimeters - **Photo Filter Thread Size:** 31.75 millimeters - **Product Dimensions:** 1.25"L x 1.25"W - **Water Resistance Level:** Moisture Resistant ## Images ![Astromania O-III Filter 1.25inch Telescope Filter Narrowband Nebula Filters - Image 1](https://m.media-amazon.com/images/I/71vX645DYaL.jpg) ## Available Options This product comes in different **Size** options. ## Frequently Bought Together - Astromania 1.25" O-III Filter - Enhances Contrast During Visual Observation of Gaseous and Planetary Nebulae in All Sky Conditions, The Veil, Ring, Dumbbell and Orion Nebula, Among Many Other Objects - Astromania 1.25" UHC (Ultra High Contrast) Filter - Superb Views of The Orion, Lagoon, Swan and Other Extended Nebulae - Astromania 1.25" H-Alpha Night Sky Filter --- ## 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.co.za/products/20883930-astromania-o-iii-filter-1-25inch-telescope-filter-narrowband-nebula](https://www.desertcart.co.za/products/20883930-astromania-o-iii-filter-1-25inch-telescope-filter-narrowband-nebula) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-10-13*