{"id":9942,"date":"2017-09-27T18:51:18","date_gmt":"2017-09-27T18:51:18","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/imagerie-a-2900m-v-pousser-la-focale-du-250-en-ha\/"},"modified":"2025-06-08T22:45:30","modified_gmt":"2025-06-08T20:45:30","slug":"imagerie-a-2900m-v-pousser-la-focale-du-250-en-ha","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/imagerie-a-2900m-v-pousser-la-focale-du-250-en-ha\/","title":{"rendered":"Imagerie \u00e0 2900m (V) – Pousser la focale du 250 en Ha"},"content":{"rendered":"

Ou il faudrait dire pousser le F\/D.<\/p>\n

Le T250 solaire est taill\u00e9 \u00e0 F7, pour \u00eatre combin\u00e9 \u00e0 une t\u00e9l\u00e9centique x4 et atteindre un F\/D de 28.
\nF\/D 28 consid\u00e9r\u00e9 comme \u00e9tant le minimum pour de l’observation solaire en Halpha.<\/p>\n

Pour esp\u00e9rer un meilleur contraste, et aussi une meilleure r\u00e9solution, le F\/D a \u00e9t\u00e9 pouss\u00e9 \u00e0 35 (+25%).
\nLa focale r\u00e9sultante est proche de 9m.<\/p>\n

L’image est une mosa\u00efque de 3 champs primaires.<\/p>\n

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

Voici une version invers\u00e9e. Je n’en fais g\u00e9n\u00e9ralement pas en fait.<\/p>\n

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

Alexandre
\n2017Aug29
\nSolar newton T250
\nTelecentric x4 + GWK x1.25
\nSolar spectrum
\nZWO ASI174 <\/p>\n\n\n

\n \n
\n \n
\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n <\/div>\n \n
\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n <\/div>\n<\/div>\n \n\n
\n 10\/10 - (1 vote) <\/div>\n <\/div>\n","protected":false},"excerpt":{"rendered":"

Ou il faudrait dire pousser le F\/D. Le T250 solaire est taill\u00e9 \u00e0 F7, pour \u00eatre combin\u00e9 \u00e0 une t\u00e9l\u00e9centique x4 et atteindre un F\/D de 28. F\/D 28 consid\u00e9r\u00e9 comme \u00e9tant le minimum pour de l’observation solaire en Halpha. Pour esp\u00e9rer un meilleur contraste, et aussi une meilleure r\u00e9solution, le F\/D a \u00e9t\u00e9 pouss\u00e9 […]<\/p>\n","protected":false},"author":16,"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-9942","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9942","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\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=9942"}],"version-history":[{"count":1,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9942\/revisions"}],"predecessor-version":[{"id":11741,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9942\/revisions\/11741"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=9942"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=9942"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=9942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}