{"product_id":"used-vaonis-vespera-dual-band-filter-4","title":"Used Vaonis Vespera Dual-Band Filter","description":"\u003cp\u003eThis is a returned Vespera dual-band filter in excellent, clean condition.  The only reason we're not listing this as an Open Box is because the previous owner etched \"Dual Band\" into the plastic jewel box.  Otherwise, the filter itself is practically untouched.  Save \u003cstrong\u003eFIFTY BUCKS\u003c\/strong\u003e off of a brand new one!  \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAny dust you may see in the photos is removable - it seems that these filters develop an electrostatic charge such that the dust in the air is just attracted to the filter.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIt comes in the etched jewel case and its original box.  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Vespera Dual Band Filter is a dual narrowband interference filter that will significantly improve your photo quality whether you are viewing from an urban or natural environment.\u003c\/p\u003e\n\u003cp\u003eBy selecting very precisely the wavelengths of Hydrogen Alpha (H-alpha) and Oxygen III (O-III), found mainly in nebulae, the filter will increase the contrast between the Stellar object and the sky background. Thus, its use makes it possible to obtain a higher-quality image, with sharper stars and finer details.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSignificantly improves photo quality\u003c\/li\u003e\n\u003cli\u003eIdeal for nebula photography\u003c\/li\u003e\n\u003cli\u003eIncreases the contrast between the sky background and the stellar object\u003c\/li\u003e\n\u003cli\u003eRefines stars and details\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThe Vespera Dual Band Filter is a dual narrowband interference filter that will significantly improve your photo quality whether you are viewing from an urban or natural environment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eBy selecting very precisely the wavelengths of Hydrogen Alpha (H-alpha) and Oxygen III (O-III), found mainly in nebulae, the filter will increase the contrast between the Stellar object and the sky background. Thus, its use makes it possible to obtain a higher-quality image, with sharper stars and finer details.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ciframe height=\"480\" width=\"70%\" src=\"https:\/\/cdn.knightlab.com\/libs\/juxtapose\/latest\/embed\/index.html?uid=65473a78-7a1e-11ed-b5bd-6595d9b17862\" class=\"juxtapose\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKeep only the essential\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe Dual Band filter has been designed to allow only two particular wavelengths to pass through to the Vespera sensor:\u003cbr\u003e– O-III\u003cbr\u003e– H-alpha\u003c\/p\u003e\n\u003cp\u003eDue to the filtered wavelengths, it is particularly effective for photographing nebulae in emission (e.g.: Orion nebula M42, Heart nebula IC 1805 …), dark nebulae endowed with hydrogen (e.g.: Horsehead or Elephant’s Trunk nebula…), planetary nebulae (e.g.: Owl nebula M97, Dumbbell nebula M27…), supernova remnants (e.g.: Veil nebula, Crab Nebula M1…).\u003c\/p\u003e\n\u003cp\u003eFor globular clusters (e.g.: Hercules cluster M13, cluster M92…), the selectivity of the Dual Band filter will help you to obtain sharper stars.\u003c\/p\u003e\n\u003cp\u003e\u003ciframe height=\"480\" width=\"70%\" src=\"https:\/\/cdn.knightlab.com\/libs\/juxtapose\/latest\/embed\/index.html?uid=3ccbf9e2-7a25-11ed-b5bd-6595d9b17862\" class=\"juxtapose\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA filter specifically studied for Vespera\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe optical quality of the Dual Band filter has been specifically studied by our engineers to offer use at full aperture, without any impact on the optical diameter of the instrument. The lens ring is equipped with an electronic micro-card that allows Vespera to detect the Dual Band filter and adapt its observation and image processing parameters.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransmission curve\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe filter features 12nm of bandwidth in each wavelength (O-III = 500.7nm, H-alpha = 656.3nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca class=\"swipebox\" title=\"\" data-rl_caption=\"\" data-rl_title=\"\" data-rel=\"lightbox-image-0\" href=\"https:\/\/vaonis.com\/wp-content\/uploads\/2022\/12\/Vaonis-Graphique-Dual-Band.jpg\"\u003e\u003cimg height=\"300\" width=\"777\" alt=\"\" src=\"https:\/\/vaonis.com\/wp-content\/uploads\/2022\/12\/Vaonis-Graphique-Dual-Band.jpg\" class=\"alignnone wp-image-22062 size-full\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Vaonis","offers":[{"title":"Default Title","offer_id":48696392909059,"sku":"U2606-XXX-AC022","price":350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/762620f9-e927-4c25-bf50-341e7e5012cc.jpg?v=1782585102","url":"https:\/\/milehighastro.com\/products\/used-vaonis-vespera-dual-band-filter-4","provider":"Mile High Astronomy","version":"1.0","type":"link"}