{"id":8749,"date":"2008-10-19T15:20:22","date_gmt":"2008-10-19T15:20:22","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/m27-a-longue-focale\/"},"modified":"2025-07-14T10:49:37","modified_gmt":"2025-07-14T08:49:37","slug":"m27-a-longue-focale","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/m27-a-longue-focale\/","title":{"rendered":"M27 \u00e0 longue focale"},"content":{"rendered":"

Une bonne (vieille) M27, que je n’avais jamais eu le temps de traiter.<\/p>\n

C’est le r\u00e9sultat de poses de 15 minutes, prises en plusieurs nuits, avec mon VC200L \u00e0 F\/9 (1800mm de focale).<\/p>\n

La monture est une AP Mach1, la cam\u00e9ra une CCD Starlight SXVF-M25C (one shot color), avec filtre IDAS LPS.
\nLe guidage est fait avec la petite CCD d’autoguidage de Starlightet un off-axis guider.<\/p>\n

Prise de vue et traitement dans MaxIm, avec flats et flatdarks; darks utilis\u00e9s pour la suppression des pixels chauds.
\nContraste et niveaux dans PhotoShop, ainsi qu’un l\u00e9ger masque flou.<\/p>\n

Il y a pas mal de d\u00e9tails dans la n\u00e9bulosit\u00e9, il faut dire que le temps de pose est de pr\u00e8s de 6 heures au total (toutes couleurs confondues).<\/p>\n

Qualit\u00e9 jpeg 60%<\/p>\n

\"\"<\/a><\/p>\n

Mise \u00e0 jour 20.10.2008
\nDidier Vothy a eu la gentillesse de retraiter l’image comme suit:
\n– \u00ab\u00a0black\u00a0\u00bb pour le noir;
\n– \u00ab\u00a0\u00e9galisation modifi\u00e9e\u00a0\u00bb;
\n– saturation l\u00e9g\u00e8re.
\nElle y gagne au change, en effet ! La revoici donc.<\/p>\n

\"\"<\/a><\/p>\n

Pierre<\/p>\n\n\n

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\n Veuillez voter<\/span>\n <\/div>\n <\/div>\n","protected":false},"excerpt":{"rendered":"

Une bonne (vieille) M27, que je n’avais jamais eu le temps de traiter. C’est le r\u00e9sultat de poses de 15 minutes, prises en plusieurs nuits, avec mon VC200L \u00e0 F\/9 (1800mm de focale). La monture est une AP Mach1, la cam\u00e9ra une CCD Starlight SXVF-M25C (one shot color), avec filtre IDAS LPS. Le guidage est […]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[2],"tags":[],"class_list":["post-8749","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/8749","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=8749"}],"version-history":[{"count":4,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/8749\/revisions"}],"predecessor-version":[{"id":16106,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/8749\/revisions\/16106"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=8749"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=8749"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=8749"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}