{"id":1526,"date":"2018-08-20T07:45:47","date_gmt":"2018-08-20T05:45:47","guid":{"rendered":"https:\/\/www.primalucelab.com\/wp\/astronomia\/?p=1526"},"modified":"2022-03-14T14:09:46","modified_gmt":"2022-03-14T13:09:46","slug":"astrofotografia-ed-inquinamento-luminoso-astrophotography-and-light-pollution","status":"publish","type":"post","link":"https:\/\/www.primalucelab.it\/blog\/astrofotografia-ed-inquinamento-luminoso-astrophotography-and-light-pollution\/","title":{"rendered":"Astrofotografia ed inquinamento luminoso"},"content":{"rendered":"<p style=\"text-align: justify;\">L&#8217;inquinamento luminoso influisce sull&#8217;astrofotografia? E&#8217; possibile fotografare galassie, nebulose o ammassi stellari con il nostro telescopio anche dal giardino di casa in presenza di inquinamento luminoso utilizzando filtri nebulari a banda stretta? Vediamo il risultato del nostro test confrontando l&#8217;immagine di una nebulosa ripresa con lo stesso telescopio e lo stesso tempo di posa ma da un posto a basso inquinamento luminoso e da un&#8217;area vicino alla citt\u00e0.<\/p>\r\n<!--more-->\r\n<p style=\"text-align: justify;\">Abbiamo scelto di riprendere la nebulosa Pellicano (IC 5070) nel Cigno, utilizzando un filtro H-alfa 7nm della Baader Planetarium e impostando 600 secondi di tempo di posa e binning 2&#215;2. La ripresa \u00e8 stata effettuata con il nostro telescopio Celestron EdgeHD 925 su montatura Avalon-Instruments M-Uno con camera CCD ATIK 16200 monocromatica, tutto comandato da EAGLE.<\/p>\r\n&nbsp;\r\n<p style=\"text-align: center;\"><iframe loading=\"lazy\" style=\"width: 100%; max-width: 650px;\" src=\"https:\/\/www.youtube.com\/embed\/sHnMy2_RCPU?rel=0\" width=\"300\" height=\"365\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\r\n&nbsp;\r\n<p style=\"text-align: justify;\">Abbiamo selezionato il primo posto a basso inquinamento luminoso sulle prealpi friulane, ad un&#8217;altezza di circa 700 metri sul livello del mare. Abbiamo misurato il valore dell&#8217;SQM (Sky Quality Meter) ottenendo un buon&nbsp;20.8.<\/p>\r\n&nbsp;\r\n\r\n<figure id=\"attachment_1531\" aria-describedby=\"caption-attachment-1531\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1531\" src=\"https:\/\/www.primalucelab.com\/wp\/astronomia\/wp-content\/uploads\/sites\/3\/2018\/08\/articolo-astrofotografia-inquinamento-luminoso-1.jpg\" alt=\"Astrofotografia ed inquinamento luminoso: il nostro telescopio sotto un cielo a basso inquinamento luminoso\" width=\"650\" height=\"366\"><figcaption id=\"caption-attachment-1531\" class=\"wp-caption-text\">Astrofotografia ed inquinamento luminoso: il nostro telescopio sotto un cielo a basso inquinamento luminoso<\/figcaption><\/figure>\r\n\r\n&nbsp;\r\n<p style=\"text-align: justify;\">Abbiamo poi spostato il telescopio in pianura, vicino a Pordenone in un luogo con molto inquinamento luminoso. Qui abbiamo misurato un SQM di 19.4.<\/p>\r\n&nbsp;\r\n\r\n<figure id=\"attachment_1537\" aria-describedby=\"caption-attachment-1537\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1537\" src=\"https:\/\/www.primalucelab.com\/wp\/astronomia\/wp-content\/uploads\/sites\/3\/2018\/08\/articolo-astrofotografia-inquinamento-luminoso-2.jpg\" alt=\"Astrofotografia ed inquinamento luminoso: il nostro telescopio sotto un cielo ad elevato inquinamento luminoso\" width=\"650\" height=\"366\"><figcaption id=\"caption-attachment-1537\" class=\"wp-caption-text\">Astrofotografia ed inquinamento luminoso: il nostro telescopio sotto un cielo ad elevato inquinamento luminoso<\/figcaption><\/figure>\r\n\r\n&nbsp;\r\n<p style=\"text-align: justify;\">Dopo aver registrato entrambe le fotografie (con lo stesso tempo di posa ed impostazioni) abbiamo quindi applicato&nbsp;lo stesso stretch dell&#8217;istogramma per evidenziare meglio la nebulosa e sovrapposto le immagini, generando il risultato che potete vedere sotto:<\/p>\r\n&nbsp;\r\n\r\n<figure id=\"attachment_1539\" aria-describedby=\"caption-attachment-1539\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1539\" src=\"https:\/\/www.primalucelab.com\/wp\/astronomia\/wp-content\/uploads\/sites\/3\/2018\/08\/articolo-astrofotografia-inquinamento-luminoso-3.gif\" alt=\"Astrofotografia ed inquinamento luminoso: confronto tra le due immagini\" width=\"650\" height=\"529\"><figcaption id=\"caption-attachment-1539\" class=\"wp-caption-text\">Astrofotografia ed inquinamento luminoso: confronto tra le due immagini<\/figcaption><\/figure>\r\n\r\n&nbsp;\r\n<p style=\"text-align: justify;\">&nbsp;Potete facilmente notare come l&#8217;imagine registrata dal sito a basso inquinamento luminoso mostra un migliore contrasto e visibilit\u00e0 dei dettagli pi\u00f9 deboli. Alla fine abbiamo deciso di registrare 10 immagini da 10 minuti ciascuna (ovviamente dal sito a basso inquinamento luminoso!) e le abbiamo sommate, ottenendo l&#8217;immagine che potete vedere qui sotto.<\/p>\r\n&nbsp;\r\n\r\n<figure id=\"attachment_1541\" aria-describedby=\"caption-attachment-1541\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1541\" src=\"https:\/\/www.primalucelab.com\/wp\/astronomia\/wp-content\/uploads\/sites\/3\/2018\/08\/IC5070-600s-bin2-inquinamento-luminoso-confronto-4.jpg\" alt=\"Astrofotografia ed inquinamento luminoso: immagine della Nebulosa Pellicano, somma di 10 pose da 600 secondi ciascuna\" width=\"650\" height=\"520\"><figcaption id=\"caption-attachment-1541\" class=\"wp-caption-text\">Astrofotografia ed inquinamento luminoso: immagine della Nebulosa Pellicano, somma di 10 pose da 600 secondi ciascuna<\/figcaption><\/figure>\r\n\r\n<p>&nbsp;<\/p>\r\n    <div 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         <\/div>            <\/div>\n        <\/section>\n    <\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>L&#8217;inquinamento luminoso influisce sull&#8217;astrofotografia? E&#8217; possibile fotografare galassie, nebulose o ammassi stellari con il nostro telescopio anche dal giardino di casa in presenza di inquinamento luminoso utilizzando filtri nebulari a banda stretta? Vediamo il risultato del nostro test confrontando l&#8217;immagine di una nebulosa ripresa con lo stesso telescopio e lo&#8230;<\/p>\n","protected":false},"author":2,"featured_media":2458,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[65],"tags":[],"class_list":["post-1526","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guide-astrofotografia-per-principianti"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v16.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Astrofotografia ed inquinamento luminoso<\/title>\n<meta name=\"description\" content=\"L&#039;inquinamento luminoso influisce sull&#039;astrofotografia? E&#039; fare astrotografia con il nostro telescopio utilizzando filtri nebulari a banda stretta?\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.primalucelab.it\/blog\/astrofotografia-ed-inquinamento-luminoso-astrophotography-and-light-pollution\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Astrofotografia ed inquinamento luminoso\" \/>\n<meta property=\"og:description\" content=\"L&#039;inquinamento luminoso influisce sull&#039;astrofotografia? 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