{"product_id":"explore-scientific-0-8x-focal-reducer-for-80-mm-120-mm-apo-telescopes-es-fr0-8x","title":"Explore Scientific 0.8X Focal Reducer for f\/5 \u0026 f\/7 ES Refractors - ES-FR0.8X","description":"\u003cp\u003eThe Explore Scientific 0.8x Focal Reducer lets astrophotographers explore the wonders of wide-field astrophotography in an easy-to-use package.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe 0.8x Focal Reducer works with the following Explore Scientific telescopes:\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eED80 Essential Series Air-Spaced Triplet Refractor Telescope - ES-ED0806-02\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eED102 Essential Series Air-Spaced Triplet APO Refractor Telescope - ES-ED10207-02\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eED80-FCD100 Series Air-Spaced Triplet Refractor Telescope - FCD100-0806-02\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eED102-FCD100 Series Air-Spaced Triplet Refractor Telescope - FCD100-10207-02\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eED102-FCD100 Series Air-Spaced Triplet Telescope in Carbon Fiber - FCD100-10207-CF-01\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 2-element 0.8x focal reducer turns the 480mm focal length telescopes into devices with a focal length of 384 mm. This changes the telescopes from an f\/ratio of f\/6 to a much faster f\/4.8.\u003c\/p\u003e\n\u003cp\u003eThe device turns the 102 mm telescopes, with a focal length of 714 mm, into telescopes with a focal length of 571 mm: From f\/7 to f\/5.6.\u003c\/p\u003e\n\u003cp\u003eThe faster f\/ratio, coupled with more light-gathering aperture, allows more light to fall onto the camera sensor. For instance, to capture the same amount of light as a 100-second exposure with the Explore Scientific 80 mm takes 256 seconds on a 50 mm, 178 seconds on a 60 mm, and 131 sec on 70 mm – assuming the same f\/ratio. This means that the Explore Scientific 80mm telescope with the 0.8x Focal Reducer can capture far more detail faster than the competition.\u003c\/p\u003e\n\u003cp\u003eThe Explore Scientific 0.8X focal reducer, which has 55 mm (+\/- 2 mm) of back spacing, is threaded to accept a standard 42 mm T-ring, making attaching a camera easy.\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":41545650569329,"sku":"EXP-ES-FR0.8X","price":107.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/ES-FR0.8X.webp?v=1776459300","url":"https:\/\/khanscope.com\/en-fr\/products\/explore-scientific-0-8x-focal-reducer-for-80-mm-120-mm-apo-telescopes-es-fr0-8x","provider":"Khan Scope Centre","version":"1.0","type":"link"}