{"id":10924,"date":"2024-10-16T08:00:00","date_gmt":"2024-10-16T06:00:00","guid":{"rendered":"https:\/\/www.blog.neoprog.eu\/?p=10924"},"modified":"2024-10-11T15:06:44","modified_gmt":"2024-10-11T13:06:44","slug":"le-petit-setup-dastro-photographie","status":"publish","type":"post","link":"https:\/\/www.blog.neoprog.eu\/index.php\/2024\/10\/16\/le-petit-setup-dastro-photographie\/","title":{"rendered":"Le petit setup d&rsquo;astro photographie"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/setup-astro-photo-1.jpg\" alt=\"\" class=\"wp-image-10926\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/setup-astro-photo-1.jpg 1024w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/setup-astro-photo-1-300x225.jpg 300w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/setup-astro-photo-1-768x576.jpg 768w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/setup-astro-photo-1-400x300.jpg 400w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Aujourd\u2019hui, apr\u00e8s de nombreux t\u00e2tonnements, j\u2019ai stabilis\u00e9 mon setup d\u2019astronomie. Je ne dirais pas qu\u2019il s\u2019agit d\u2019une solution id\u00e9ale mais c\u2019est un bon compromis entre poids, budget et performance.<\/p>\n\n\n\n<p>Il s\u2019agit d\u2019un setup qui ne sert qu\u2019\u00e0 la photographie astronomique du ciel profond c\u2019est \u00e0 dire les n\u00e9buleuses, les galaxies et les amas d\u2019\u00e9toiles. Ne disposant pas de lieu d\u2019observation fixe, un de mes crit\u00e8res de choix a \u00e9t\u00e9 la transportabilit\u00e9 du mat\u00e9riel et sa mise en station rapide.<\/p>\n\n\n\n<p>Parlons de la monture tout d\u2019abord. Une monture \u00e9quatoriale est l\u2019\u00e9quipement qui supporte l\u2019instrument optique et qui permet de l\u2019orienter vers un objet comme de compenser la rotation de la Terre. Pour l\u2019astro photographie il doit \u00eatre motoris\u00e9 et d\u2019une grande pr\u00e9cision pour pouvoir r\u00e9aliser des pauses longues. Car les \u00e9toiles donnent l\u2019impression de tourner dans le ciel, comme le soleil. L&rsquo;\u00e9quipement en question est lourd, capable de porter plusieurs kilogrammes de mat\u00e9riel.\u00a0<\/p>\n\n\n\n<p>J\u2019ai opt\u00e9 pour la monture <a href=\"https:\/\/www.blog.neoprog.eu\/index.php\/2023\/12\/22\/zwo-am5\/\">ZWO AM5<\/a> qui ne p\u00e8se que 5.5 kg et se transporte dans une petite valise. Une monture harmonique capable de supporter 13 kg d\u2019\u00e9quipement, soit un peu plus de 8 pour l\u2019astro photo (il faut toujours appliquer la r\u00e8gle des 2\/3 par rapport aux sp\u00e9cifications constructeur, c\u2019est comme pour l\u2019autonomie des voitures \u00e9lectriques). Par comparaison j&rsquo;ai \u00e9galement une <a href=\"https:\/\/www.blog.neoprog.eu\/index.php\/2023\/03\/08\/quarante-kilos\/\">monture AVX<\/a> qui p\u00e8se 21 kg sans le contrepoids (5 kg) et le trepied (8 kg) et qui poss\u00e8de la m\u00eame capacit\u00e9 de charge. <\/p>\n\n\n\n<p>Pourquoi avoir choisi une monture poss\u00e9dant une telle capacit\u00e9 de charge ? Car j\u2019utilise \u00e9galement un t\u00e9lescope Celestron 8 parfait pour le plan\u00e9taire que je peux monter dessus et qui lui p\u00e8se 6 kg sans les accessoires. Autant pouvoir utiliser la monture pour plusieurs usages.<\/p>\n\n\n\n<p>Le principal d\u00e9faut de l\u2019AM5 est son prix dissuasif : un peu plus de 2500 euros.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/ZWO-AM5.jpeg\" alt=\"\" class=\"wp-image-10927\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/ZWO-AM5.jpeg 800w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/ZWO-AM5-300x300.jpeg 300w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/ZWO-AM5-150x150.jpeg 150w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/ZWO-AM5-768x768.jpeg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Pour poser la monture sur le sol, il faut un tr\u00e9pied stable. Et ceux-ci sont \u00e9galement assez lourds \u00e0 moins d\u2019en choisir fabriqu\u00e9e avec des mat\u00e9riaux composites comme la fibre de carbone.<\/p>\n\n\n\n<p>Avec la monture ZWO j\u2019ai pris naturellement le tr\u00e9pied en fibre de carbone ZWO TC40 qui ne p\u00e8se que 2.3 kg mais qui coute la bagatelle de 375 euros. La l\u00e9g\u00e8ret\u00e9 a un prix.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/trepied-TC40.jpeg\" alt=\"\" class=\"wp-image-10928\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/trepied-TC40.jpeg 800w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/trepied-TC40-300x300.jpeg 300w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/trepied-TC40-150x150.jpeg 150w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/trepied-TC40-768x768.jpeg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Pour ce qui est des instruments, il en existe de multiples. Des lunettes et des t\u00e9lescopes avec des syst\u00e8mes optiques tr\u00e8s divers, fait pour l\u2019observation plan\u00e9taire, pour le ciel profond et surtout pour toutes les bourses. Les t\u00e9lescopes Dobson ne sont pas cher mais encombrants et pas vraiment pr\u00e9vu pour la photographie, les Schmitt Cassegrain sont plus compacts mais peu lumineux, les lunettes sont relativement abordables mais pour la photographie il faut viser les optiques apochromatiques pour corriger les d\u00e9fauts des lentilles et c\u2019est plus cher \u00e9videment.<\/p>\n\n\n\n<p>Je voulais une lunette apochromatique de petite focale pour obtenir un grand champ et beaucoup de lumi\u00e8re. Le diam\u00e8tre de la lentille d\u00e9termine les d\u00e9tails que l\u2019on pourra observer, la longueur du tube ou focale, le grossissement et le F\/D la lumi\u00e8re re\u00e7ue. La Skywatcher 72ED s\u2019est impos\u00e9e par son prix et ses qualit\u00e9s optiques acceptables. 420 mm de focale, 72 mm de diam\u00e8tre, un F\/D 5.8 et moins de 2 kg. Elle est vendue \u00e0 moins de 400 euros.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/Lunette-apochromatique-Skywatcher-Tube-Optique-Seul-AP-72-420-EvoStar-72-ED-DS-Pro.jpg\" alt=\"\" class=\"wp-image-10929\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/Lunette-apochromatique-Skywatcher-Tube-Optique-Seul-AP-72-420-EvoStar-72-ED-DS-Pro.jpg 800w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/Lunette-apochromatique-Skywatcher-Tube-Optique-Seul-AP-72-420-EvoStar-72-ED-DS-Pro-300x300.jpg 300w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/Lunette-apochromatique-Skywatcher-Tube-Optique-Seul-AP-72-420-EvoStar-72-ED-DS-Pro-150x150.jpg 150w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/Lunette-apochromatique-Skywatcher-Tube-Optique-Seul-AP-72-420-EvoStar-72-ED-DS-Pro-768x768.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Bien entendu j\u2019ai ajout\u00e9 un r\u00e9ducteur de focale 0.85x SkyWatcher 0420 pour arriver \u00e0 un F\/D 4.9 car en astronomie la lumi\u00e8re c\u2019est la vie (plus la valeur est petite, plus c\u2019est lumineux). Le petit accessoire se vend plus de 250 euros quand m\u00eame.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/Skywatcher-Flattener-0-85x-EvoStar-72-ED.jpg\" alt=\"\" class=\"wp-image-10930\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/Skywatcher-Flattener-0-85x-EvoStar-72-ED.jpg 800w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/Skywatcher-Flattener-0-85x-EvoStar-72-ED-300x300.jpg 300w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/Skywatcher-Flattener-0-85x-EvoStar-72-ED-150x150.jpg 150w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/Skywatcher-Flattener-0-85x-EvoStar-72-ED-768x768.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Pour la photographie, apr\u00e8s avoir utilis\u00e9 un appareil photo viss\u00e9 \u00e0 l\u2019arri\u00e8re de l\u2019instrument, je suis pass\u00e9 \u00e0 la cam\u00e9ra. L\u2019appareil photo filtre certaines fr\u00e9quences comme l\u2019infrarouge pour reproduire ce que per\u00e7oit nos yeux. Les cam\u00e9ras astro ne filtrent rien ce qui les rend beaucoup plus sensibles aux faibles luminosit\u00e9s.&nbsp;<\/p>\n\n\n\n<p>J\u2019ai achet\u00e9 une <a href=\"https:\/\/www.blog.neoprog.eu\/index.php\/2024\/08\/07\/camera-ou-apn\/\">ZWO 533MC Pro<\/a>. C\u2019est \u00e0 dire une cam\u00e9ra couleur avec un capteur carr\u00e9 d\u2019environ 3000 pixels de cot\u00e9. Le choix a \u00e9t\u00e9 guid\u00e9 par son prix et ses performances. 1000 euros tout de m\u00eame ! Un prix assez \u00e9lev\u00e9 mais les cam\u00e9ras sont tr\u00e8s cher.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/07\/Camera-ZWO-ASI-533-MC-Pro-Color.jpg\" alt=\"\" class=\"wp-image-10757\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/07\/Camera-ZWO-ASI-533-MC-Pro-Color.jpg 800w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/07\/Camera-ZWO-ASI-533-MC-Pro-Color-300x300.jpg 300w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/07\/Camera-ZWO-ASI-533-MC-Pro-Color-150x150.jpg 150w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/07\/Camera-ZWO-ASI-533-MC-Pro-Color-768x768.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Si une monture \u00e9quatoriale sait compenser le mouvement de la terre, elle n\u2019est pas parfaite. Et pour de longues expositions, il est n\u00e9cessaire de suivre parfaitement le mouvement du ciel. Cela peut se faire gr\u00e2ce \u00e0 une lunette coupl\u00e9e \u00e0 une petite cam\u00e9ra qui avec l\u2019aide d\u2019un ordinateur va suivre le mouvement d\u2019une \u00e9toile et donner des instructions \u00e0 la monture pour corriger les petites erreurs.<\/p>\n\n\n\n<p>Je fais le guidage \u00e0 l\u2019aide d\u2019une seconde cam\u00e9ra monochrome. Une petite cam\u00e9ra ASI 120 mini coupl\u00e9e \u00e0 une lunette guide 30\/120. Un \u00e9quipement indispensable pour r\u00e9aliser des poses de plusieurs minutes avec la monture. Comptez 300 euros l\u2019ensemble.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/zwo_asi120mm_mini_1e-1024x1024.jpg\" alt=\"\" class=\"wp-image-10931\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/zwo_asi120mm_mini_1e-1024x1024.jpg 1024w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/zwo_asi120mm_mini_1e-300x300.jpg 300w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/zwo_asi120mm_mini_1e-150x150.jpg 150w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/zwo_asi120mm_mini_1e-768x768.jpg 768w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/zwo_asi120mm_mini_1e.jpg 1085w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Pour g\u00e9rer tout ce petit monde il faut un ordinateur. N\u2019ayant pas de portable j\u2019ai opt\u00e9 pour la facilit\u00e9, un <a href=\"https:\/\/www.blog.neoprog.eu\/index.php\/2023\/10\/27\/asiair-plus\/\">Asiair Plus<\/a>, petit ordinateur qui permet de piloter la monture, g\u00e9rer les cam\u00e9ras, le suivi, la mise en station, l\u2019empilement des images et la visualisation via une tablette ou un smartphone. Un petit PC \u00e0 presque 400 euros.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/AsiAirPlus.jpg\" alt=\"\" class=\"wp-image-10932\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/AsiAirPlus.jpg 800w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/AsiAirPlus-300x300.jpg 300w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/AsiAirPlus-150x150.jpg 150w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/AsiAirPlus-768x768.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Il ne faut pas oublier la batterie, car tout ce mat\u00e9riel consomme du courant. J\u2019ai opt\u00e9 pour un petit Bresser Power Tank 100 W \u00e0 150 euros. Son avantage, poss\u00e9der une grande palette de connectique, 5V USB, 12V RCA, 220 V alternatif et surtout pas trop lourd.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"788\" height=\"1024\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/alimentation-mobile-100-w-bresser-788x1024.jpg\" alt=\"\" class=\"wp-image-10933\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/alimentation-mobile-100-w-bresser-788x1024.jpg 788w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/alimentation-mobile-100-w-bresser-231x300.jpg 231w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/alimentation-mobile-100-w-bresser-768x998.jpg 768w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/10\/alimentation-mobile-100-w-bresser.jpg 1000w\" sizes=\"auto, (max-width: 788px) 100vw, 788px\" \/><\/figure>\n\n\n\n<p>Restent plein de petits accessoires indispensables comme un masque de <a href=\"https:\/\/www.blog.neoprog.eu\/index.php\/2023\/05\/05\/pavel-bahtinov\/\">Bahtinov<\/a> pour r\u00e9aliser la mise au point, un bandeau r\u00e9chauffeur pour \u00e9viter la bu\u00e9e, une boite \u00e0 flat pour r\u00e9aliser des images de calibration, un range c\u00e2bles pour \u00e9viter les catastrophes, une boussole et un niveau pour la mise en station de la monture, un contrepoids de 3kg et une tige de contrepoids car m\u00eame si ZWO affirme qu\u2019il n\u2019y en a pas besoin, c\u2019est plus prudent, des c\u00e2bles pour relier tout les accessoires, plein de c\u00e2bles en fait et <a href=\"https:\/\/www.blog.neoprog.eu\/index.php\/2024\/09\/04\/ma-valise-en-carton\/\">une valise de transport<\/a>, le tout pour environ 300 euros tout de m\u00eame.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"703\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/08\/Valise-1024x703.jpg\" alt=\"\" class=\"wp-image-10826\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/08\/Valise-1024x703.jpg 1024w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/08\/Valise-300x206.jpg 300w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/08\/Valise-768x527.jpg 768w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/08\/Valise-1536x1054.jpg 1536w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/08\/Valise-437x300.jpg 437w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2024\/08\/Valise.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Et bien entendu une tablette, un iPad mini qui valait environ 500 euros lors de son achat.<\/p>\n\n\n\n<p>Je pourrais encore m&rsquo;\u00e9quiper d&rsquo;un EAF pour faire la mise au point automatiquement mais pour l&rsquo;instant je n&rsquo;en \u00e9prouve pas le besoin. Je pourrais \u00e9galement acqu\u00e9rir un instrument de meilleure facture, mais l\u00e0 encore je suis loin d&rsquo;avoir exploit\u00e9 les possibilit\u00e9s de la lunette.<\/p>\n\n\n\n<p>Si vous faites l\u2019addition, vous verrez que ce \u2018petit\u2019 setup astro ma cout\u00e9 la bagatelle plus de six mille euros.\u00a0C\u2019est l\u00e0 que je me rends compte que l\u2019astro photographie reste un loisir de riche.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aujourd\u2019hui, apr\u00e8s de nombreux t\u00e2tonnements, j\u2019ai stabilis\u00e9 mon setup d\u2019astronomie.  <a href=\"https:\/\/www.blog.neoprog.eu\/index.php\/2024\/10\/16\/le-petit-setup-dastro-photographie\/\">Continuer la lecture <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":10926,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"footnotes":""},"categories":[2810,7],"tags":[3048,2955,185,351,875,3308,3309,3047],"class_list":["post-10924","post","type-post","status-publish","format-image","has-post-thumbnail","hentry","category-astro","category-photo","tag-am5","tag-asiair","tag-astronomie","tag-materiel","tag-photographie","tag-setup","tag-skywatcher","tag-zwo","post_format-post-format-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - 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