{"product_id":"erf-1-25","title":"ERF 1.25\"","description":"Player One S series filter using high quality optical glass substrate and multi-layer composite coating technology, which has excellent optical performance in astrophotography.\r\n\r\n\u003cstrong data-spm-anchor-id=\"2013.1.0.i1.44c7454dwNdx9O\"\u003e1.25inch ERF filter ( Energy rejection filter for Quark Chromosphere）\u003c\/strong\u003e\r\n\r\nThis filter is an assistant filter, design for Quark Chromosphere (Ha verstion) ,\u003cstrong\u003e intend to reject energy and extend life time of your Quark\u003c\/strong\u003e.\r\n\r\n1.25″ ERF filter must working on\u003cstrong\u003e 5″ or smaller refractors.\u003c\/strong\u003e\r\n\r\n\u003cem\u003e\u003cstrong\u003e(DO NOT use it on eyepiece for observing)\u003c\/strong\u003e\u003c\/em\u003e\r\n\u003cp class=\"tgt\" data-section=\"0\"\u003e\u003cspan class=\"tgt\" data-section=\"0\" data-sentence=\"0\" data-group=\"0-0\"\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e 1.25 inch, thread M28.5*0.6\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp class=\"tgt\" data-section=\"2\"\u003e\u003cspan class=\"tgt\" data-section=\"2\" data-sentence=\"0\" data-group=\"2-0\"\u003e\u003cstrong\u003eFrame thickness:\u003c\/strong\u003e body 5mm+ thread 2.5mm, a total of 7.5mm\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp class=\"tgt\" data-section=\"4\"\u003e\u003cspan class=\"tgt\" data-section=\"4\" data-sentence=\"0\" data-group=\"4-0\"\u003e\u003cstrong\u003eThickness of filter lens:\u003c\/strong\u003e 2.5mm\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp data-section=\"4\"\u003e\u003cstrong\u003ePV:\u003c\/strong\u003e 1\/4 lambda\u003c\/p\u003e\r\n\u003cp class=\"tgt\" data-section=\"6\"\u003e\u003cspan class=\"tgt\" data-section=\"6\" data-sentence=\"0\" data-group=\"6-0\"\u003e\u003cstrong\u003eTransmittance:\u003c\/strong\u003e ≈97%\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp class=\"tgt\" data-section=\"8\"\u003e\u003cspan class=\"tgt\" data-section=\"8\" data-sentence=\"0\" data-group=\"8-0\"\u003e\u003cstrong\u003eBlocking depth:\u003c\/strong\u003e OD4 (200nm-1100nm)\u003c\/span\u003e\u003c\/p\u003e","brand":"Astro Hutech","offers":[{"title":"Default Title","offer_id":49343896224050,"sku":"","price":49.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/6995\/5122\/files\/ERF-1000.jpg?v=1727243989","url":"https:\/\/a7ead1-f1.myshopify.com\/products\/erf-1-25","provider":"Astro Hutech","version":"1.0","type":"link"}