{"id":1206,"date":"2014-06-22T17:06:15","date_gmt":"2014-06-22T15:06:15","guid":{"rendered":"http:\/\/www.astrobobo.net\/?p=1206"},"modified":"2023-07-12T08:48:15","modified_gmt":"2023-07-12T06:48:15","slug":"barndoor-test","status":"publish","type":"post","link":"https:\/\/www.astrobobo.net\/?p=1206","title":{"rendered":"Barndoor test"},"content":{"rendered":"<p><code><div id=\"google_language_translator\" class=\"default-language-hr\"><\/div><\/code><\/p>\n<p>Za radionicu astrofotografije potrudio sam se napraviti barndoor ili scotch monta\u017eu za jednostavno pra\u0107enje do desetak minuta ekspozicije. Detaljnija obja\u0161njenja za izradu biti \u0107e uskoro u posebnom postu, no za sada mogu re\u0107i da stvar funkcionira odli\u010dno. Izvor informacija mi je bio <a href=\"http:\/\/kis-miljenko.com\/AF_BarnDoor.html\">stari web Miljenka Ki\u0161a<\/a> pa ako ste nestrpljivi pogledajte tamo.<\/p>\n<p>Nakon duljeg vremena zvijezde su se smilovale i oti\u0161ao sam na Sljeme isprobati monta\u017eu. Barndoor zbilja nije neka velika mudrost, no ipak je zadovoljstvo kada se napravi ne\u0161to tako jednostavno, a rezultati budu dobri.<\/p>\n<figure id=\"attachment_1207\" aria-describedby=\"caption-attachment-1207\" style=\"width: 200px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2014\/06\/barndoor.jpg\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-1207 size-medium\" src=\"http:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2014\/06\/barndoor-200x300.jpg\" alt=\"barndoor\" width=\"200\" height=\"300\" srcset=\"https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2014\/06\/barndoor-200x300.jpg 200w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2014\/06\/barndoor-133x200.jpg 133w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2014\/06\/barndoor.jpg 601w\" sizes=\"(max-width: 200px) 100vw, 200px\" \/><\/a><figcaption id=\"caption-attachment-1207\" class=\"wp-caption-text\">Gotova barndoor monta\u017ea<\/figcaption><\/figure>\n<p>Nebo na Sljemenu nije nikada savr\u0161eno, no bilo je sasvim ok s obzirom da su cijeli dan na nebu visili dosadni cirusi. Mlije\u010dni put se \u010dak slaba\u0161no nazirao. Sasvim dovoljno za testiranje monta\u017ee, ali na kraju me rezultat ugodno iznenadio:<\/p>\n<figure id=\"attachment_1204\" aria-describedby=\"caption-attachment-1204\" style=\"width: 209px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/sve-mala.jpg\"><img decoding=\"async\" class=\"wp-image-1204 size-medium\" src=\"http:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/sve-mala-209x300.jpg\" alt=\"sve-mala\" width=\"209\" height=\"300\" srcset=\"https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/sve-mala-209x300.jpg 209w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/sve-mala-139x200.jpg 139w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/sve-mala.jpg 627w\" sizes=\"(max-width: 209px) 100vw, 209px\" \/><\/a><figcaption id=\"caption-attachment-1204\" class=\"wp-caption-text\">Maglice u Labudu. Modificirani Nikon D5100, ISO 800, 50mm, f\/5,6, 5x2min<\/figcaption><\/figure>\n<p>Samo per ekspozicija sa vrlo konzervativnim postavkama: ISO 800, f\/5.6, ekspozicije od dvije minute, a maglice u Labudu su nakon pa\u017eljivije obrade jako dobro vidljive. Ovo je svega deset minuta ukupne ekspozicije kroz fiksni 50mm objektiv.<\/p>\n<p>Pra\u0107enje je potpuno ru\u010dno, ravnomjernim okretanjem kota\u010da (poklopca kantice jogurta) jednom u minuti mogu se dobiti savr\u0161eno o\u0161tre zvijezde. Evo crop u 100% rezoluciji:<\/p>\n<p><a href=\"http:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2014\/06\/sve-crop.jpg\"><img decoding=\"async\" class=\"aligncenter size-medium wp-image-1208\" src=\"http:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2014\/06\/sve-crop-393x300.jpg\" alt=\"sve-crop\" width=\"393\" height=\"300\" srcset=\"https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2014\/06\/sve-crop-393x300.jpg 393w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2014\/06\/sve-crop-262x200.jpg 262w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2014\/06\/sve-crop.jpg 671w\" sizes=\"(max-width: 393px) 100vw, 393px\" \/><\/a>Dvije minute nije puno, ali za usporebu napravio sam kratku animaciju kako izgleda isti dio neba bez pra\u0107enja i nakon dvije minute ru\u010dnog \u0161arafljenja kota\u010da barndoora (kliknite na fotku):<\/p>\n<figure id=\"attachment_1209\" aria-describedby=\"caption-attachment-1209\" style=\"width: 608px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2014\/06\/barndoor-usporedba-animacija.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1209 size-full\" src=\"http:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2014\/06\/barndoor-usporedba-animacija.gif\" alt=\"barndoor-usporedba-animacija\" width=\"608\" height=\"417\" \/><\/a><figcaption id=\"caption-attachment-1209\" class=\"wp-caption-text\">Maglice u Labudu, 50mm objektiv, 2 min sa i bez pra\u0107enja<\/figcaption><\/figure>\n<p>Dugo se bavim astronomijom i astrofotografijom, no moram priznati da nisam vidio \u010de\u0161\u0107u upotrebu barndoora. Osim nekoliko po\u010detnih poku\u0161aja monta\u017ee su ostale zaboravljene i neiskori\u0161tene. \u0160teta, jer uz par dasaka i malo \u0161arafljenja svatko mo\u017ee napraviti jednostavnu monta\u017eu za povremenu astrofotografiju. Komercijalne monta\u017ee ko\u0161taju oko 400 USD\/EUR \u0161to mi se \u010dini zbilja puno, a uz malo truda i ovakva monta\u017ea se mo\u017ee <a href=\"http:\/\/www.garyseronik.com\/?q=node\/52\" target=\"_blank\" rel=\"noopener\">motorizirati<\/a> i napraviti jo\u0161 u\u010dinkovitijom.<\/p>\n<p>Evo jo\u0161 nekoliko primjera fotografija koje sam kasnije napravio sa tom barndoor monta\u017eom:<\/p>\n<div id='gallery-1' class='gallery galleryid-1206 gallery-columns-3 gallery-size-medium'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/www.astrobobo.net\/?attachment_id=1367'><img loading=\"lazy\" decoding=\"async\" width=\"226\" height=\"300\" src=\"https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/Orion_SVE_layers-226x300.jpg\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-1367\" srcset=\"https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/Orion_SVE_layers-226x300.jpg 226w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/Orion_SVE_layers-150x200.jpg 150w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/Orion_SVE_layers.jpg 677w\" sizes=\"(max-width: 226px) 100vw, 226px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-1367'>\n\t\t\t\tZvije\u017e\u0111e Orion.\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.astrobobo.net\/?attachment_id=1213'><img loading=\"lazy\" decoding=\"async\" width=\"396\" height=\"300\" src=\"https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/Cassiopeia-396x300.jpg\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-1213\" srcset=\"https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/Cassiopeia-396x300.jpg 396w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/Cassiopeia-264x200.jpg 264w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/Cassiopeia.jpg 900w\" sizes=\"(max-width: 396px) 100vw, 396px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-1213'>\n\t\t\t\tKasiopeja\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.astrobobo.net\/?attachment_id=1314'><img loading=\"lazy\" decoding=\"async\" width=\"425\" height=\"300\" src=\"https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/Lovejoy_7x2min_sigma_clipping_DBE_obrada-copy-2-manja-425x300.jpg\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-1314\" srcset=\"https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/Lovejoy_7x2min_sigma_clipping_DBE_obrada-copy-2-manja-425x300.jpg 425w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/Lovejoy_7x2min_sigma_clipping_DBE_obrada-copy-2-manja-283x200.jpg 283w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/Lovejoy_7x2min_sigma_clipping_DBE_obrada-copy-2-manja.jpg 854w\" sizes=\"(max-width: 425px) 100vw, 425px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-1314'>\n\t\t\t\tKomet Lovejoy, 7&#215;2 min ekspozicije.\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/www.astrobobo.net\/?attachment_id=1389'><img loading=\"lazy\" decoding=\"async\" width=\"213\" height=\"300\" src=\"https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/kocijas_better_7x2min_SPIKES_mala-213x300.jpg\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-1389\" srcset=\"https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/kocijas_better_7x2min_SPIKES_mala-213x300.jpg 213w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/kocijas_better_7x2min_SPIKES_mala-142x200.jpg 142w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/kocijas_better_7x2min_SPIKES_mala.jpg 639w\" sizes=\"(max-width: 213px) 100vw, 213px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-1389'>\n\t\t\t\tZvije\u017e\u0111e Ko\u010dija\u0161.\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/www.astrobobo.net\/?attachment_id=1385'><img loading=\"lazy\" decoding=\"async\" width=\"217\" height=\"300\" src=\"https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/Perzej_SVE_21x2min_obrada_FLAT-217x300.jpg\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-1385\" srcset=\"https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/Perzej_SVE_21x2min_obrada_FLAT-217x300.jpg 217w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/Perzej_SVE_21x2min_obrada_FLAT-144x200.jpg 144w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2009\/11\/Perzej_SVE_21x2min_obrada_FLAT.jpg 650w\" sizes=\"(max-width: 217px) 100vw, 217px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-1385'>\n\t\t\t\tZvije\u017e\u0111e Perzej.\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/www.astrobobo.net\/?attachment_id=1578'><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"300\" src=\"https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2016\/04\/ZG_Vidikovac_SVE_FINAL-spikes_mala-200x300.jpg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2016\/04\/ZG_Vidikovac_SVE_FINAL-spikes_mala-200x300.jpg 200w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2016\/04\/ZG_Vidikovac_SVE_FINAL-spikes_mala-134x200.jpg 134w, https:\/\/www.astrobobo.net\/wordpress\/wp-content\/uploads\/2016\/04\/ZG_Vidikovac_SVE_FINAL-spikes_mala.jpg 601w\" sizes=\"(max-width: 200px) 100vw, 200px\" \/><\/a>\n\t\t\t<\/div><\/figure>\n\t\t<\/div>\n\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Za radionicu astrofotografije potrudio sam se napraviti barndoor ili scotch monta\u017eu za jednostavno pra\u0107enje do desetak minuta ekspozicije. Detaljnija obja\u0161njenja za izradu biti \u0107e uskoro u posebnom postu, no za sada mogu re\u0107i da stvar funkcionira odli\u010dno. Izvor informacija mi je bio stari web Miljenka Ki\u0161a pa ako ste nestrpljivi pogledajte tamo. Nakon duljeg vremena [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1207,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"gallery","meta":{"_acf_changed":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[3],"tags":[88,69,43],"class_list":["post-1206","post","type-post","status-publish","format-gallery","has-post-thumbnail","hentry","category-astrofotografija","tag-astrofotografija","tag-barndoor","tag-sirokokutno","post_format-post-format-gallery"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"Za radionicu astrofotografije potrudio sam se napraviti barndoor ili scotch monta\u017eu za jednostavno pra\u0107enje do desetak minuta ekspozicije. Detaljnija obja\u0161njenja za izradu biti \u0107e uskoro u posebnom postu, no za sada mogu re\u0107i da stvar funkcionira odli\u010dno. Izvor informacija mi je bio stari web Miljenka Ki\u0161a pa ako ste nestrpljivi pogledajte tamo. Nakon duljeg vremena\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Bobo\"\/>\n\t<meta name=\"keywords\" content=\"astrofotografija,barndoor,scotch,mount,wide field,\u0161irokokutna,jednostavna,samogradnja,\u0161irokokutno\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.astrobobo.net\/?p=1206\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.4\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Astrobobo.net\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Barndoor test | Astrobobo.net\" \/>\n\t\t<meta property=\"og:description\" content=\"Za radionicu astrofotografije potrudio sam se napraviti barndoor ili scotch monta\u017eu za jednostavno pra\u0107enje do desetak minuta ekspozicije. Detaljnija obja\u0161njenja za izradu biti \u0107e uskoro u posebnom postu, no za sada mogu re\u0107i da stvar funkcionira odli\u010dno. Izvor informacija mi je bio stari web Miljenka Ki\u0161a pa ako ste nestrpljivi pogledajte tamo. 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Detaljnija obja\u0161njenja za izradu biti \u0107e uskoro u posebnom postu, no za sada mogu re\u0107i da stvar funkcionira odli\u010dno. Izvor informacija mi je bio stari web Miljenka Ki\u0161a pa ako ste nestrpljivi pogledajte tamo. 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