{"product_id":"ocular-explore-scientific-68-ar-40mm-2","title":"EXPLORE SCIENTIFIC 68° Ar 40mm (2\") Eyepiece","description":"With the introduction of the 68° Series, we are pleased to make two important improvements in eyepiece manufacturing, the first being 15 improved layers, Multi-layer Deposition (EMD?) coatings on all glass-to-air surfaces for maximum contrast and waterproofing of the eyepiece with the use of purged argon gas instead of standard nitrogen gas. Although nitrogen is a good choice that will last many years, argon is a larger molecule that maintains its protective properties over a wide range of temperatures, and is even more resistant to diffusion, thus broadening its water protection to the eyepiece body.\u003cbr\u003e\n\u003cbr\u003e\nThrough computer-optimized design, careful selection of optical lenses and multi-layered multi-coated deposition reinforcement, Explore Scientific 68° Series eyepieces provide a large eye relief and ensure high image correction, a flat field, and high contrast throughout the image field. An excellent choice for those who make long visual studies of detail with subtle variations in brightness, and for those who have to wear glasses while observing.\u003cbr\u003e\n\u003cbr\u003e\n68° Series eyepieces are fully EMD (Enhanced Multi-Layer Deposition) and dark-edged to produce superior contrast.","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":52791587832151,"sku":"218640","price":359.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/6198\/6860\/files\/0218640_M_2_v0416.jpg?v=1770989625","url":"https:\/\/astrotelescopios.com\/en-eu\/products\/ocular-explore-scientific-68-ar-40mm-2","provider":"Astro Telescopios","version":"1.0","type":"link"}