--- product_id: 20883930 title: "Astromania O-III Filter 1.25inch Telescope Filter Narrowband Nebula Filters" brand: "astromania" price: "¥18305" currency: JPY in_stock: true category: "Astromania" url: https://www.desertcart.jp/products/20883930-astromania-o-iii-filter-1-25inch-telescope-filter-narrowband-nebula store_origin: JP region: Japan --- # Optimizes nebula contrast in all sky conditions 95% O-III light transmittance Blocks 100% unwanted visible light Astromania O-III Filter 1.25inch Telescope Filter Narrowband Nebula Filters **Brand:** astromania **Price:** ¥18305 **Availability:** ✅ In Stock ## Summary > 🌠 Unlock the cosmos in vivid contrast—see what others miss! ## Quick Answers - **What is this?** Astromania O-III Filter 1.25inch Telescope Filter Narrowband Nebula Filters by astromania - **How much does it cost?** ¥18305 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/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 - • **Universal 1.25" Fit:** Seamlessly compatible with all 1.25 inch eyepieces and large aperture telescopes for effortless integration. - • **Dark Sky & City Ready:** Boost contrast whether you’re under pristine dark skies or battling urban light pollution—never miss a nebula again. - • **Anti-Reflection Coating:** Say goodbye to glare and ghosting with advanced multi-coating technology for pristine visual clarity. - • **Precision O-III Bandpass:** Filters only the double ionized oxygen emission lines (496-501nm) with 95% light transmittance for razor-sharp imaging. - • **Crystal-Clear Nebula Views:** Experience stunningly enhanced contrast on gaseous and planetary nebulae, even under heavy light pollution. ## Overview The Astromania O-III 1.25 inch telescope filter selectively transmits 95% of the double ionized oxygen emission lines (496-501nm) while blocking virtually all other visible light. Designed with high-grade optical glass and anti-reflection coatings, it enhances nebula contrast dramatically in both light-polluted and dark sky environments. Compatible with all 1.25 inch eyepieces, this moisture-resistant filter is ideal for large aperture telescopes and is individually inspected for quality assurance. ## 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 - 1.25 inch O-III Filter greatly enhances contrast during visual observation of gaseous and planetary nebulae in all sky condition; allows high-contrast imaging even in areas with strong light pollution - Especially useful for large aperture telescopes through which the light of the Moon can be extremely overwhelming; allowing just for the Double Ionized Oxygen lines between 496nm to 501nm to pass through at 95 percent - Completely blocks virtually all other visible wavelengths of light so views of nebulas are optimized; increases contrast through selective filtration-Anti-reflection coated to prevent glaring and ghosting - Not only useful at light-polluted sites; the contrast is also increased at dark sky sites; can be used with all 1.25 inch eyepieces; filter made from high-grade glass with dichroic interference and antireflection coatings - Each Astromania 1.25inch O-III Filter is individually inspected and proudly inscribed with the percentage of light transmittance of the two O-III emission lines ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0141U979O | | Best Sellers Rank | #44 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 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/71+VANg7S8L.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.jp/products/20883930-astromania-o-iii-filter-1-25inch-telescope-filter-narrowband-nebula](https://www.desertcart.jp/products/20883930-astromania-o-iii-filter-1-25inch-telescope-filter-narrowband-nebula) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-01*