{"id":10747,"date":"2025-01-28T12:45:35","date_gmt":"2025-01-28T12:45:35","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/shifting\/"},"modified":"2025-06-07T23:01:17","modified_gmt":"2025-06-07T21:01:17","slug":"shifting","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/shifting\/","title":{"rendered":"Shifting"},"content":{"rendered":"

Hello,<\/p>\n

nouvelle tentative d’am\u00e9lioration du CN212.<\/p>\n

A fort grossissement (focale r\u00e9sultante de 5 m\u00e8tres) j’ai remarqu\u00e9 un l\u00e9ger shift du primaire. En effet, la mise au point s’effectue par un mouvement sur l’axe du primaire. Si le guidage n’est pas parfait il peut balancer l\u00e9g\u00e8rement sur son axe ce qui a pour effet de d\u00e9placer le champ sur le capteur de la cam\u00e9ra. Tr\u00e8s emb\u00eatant lorsqu’on veut garder un objet pile au centre.<\/p>\n

Premi\u00e8re solution toujours terminer la mise au point dans le m\u00eame sens en esp\u00e9rant que le primaire reprenne sa place sur l’axe et c’est le cas du CN212.
\nSeconde solution ajouter un porte-oculaire style crayford sans jeu et id\u00e9alement motoris\u00e9. <\/p>\n

Et puis la solution du bricoleur.<\/p>\n

J’ai utilis\u00e9 des vis de pression \u00e0 bille sur ressort. Celle-ci sont plac\u00e9es en deux groupes de 3 dispos\u00e9es \u00e0 120\u00b0 sur le tube coulissant.<\/p>\n

Reste \u00e0 attendre un ciel d\u00e9gag\u00e9 pour \u00e9valuer l’efficacit\u00e9 de ce syst\u00e8me.<\/p>\n

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

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

JM<\/p>\n\n\n

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

Hello, nouvelle tentative d’am\u00e9lioration du CN212. A fort grossissement (focale r\u00e9sultante de 5 m\u00e8tres) j’ai remarqu\u00e9 un l\u00e9ger shift du primaire. En effet, la mise au point s’effectue par un mouvement sur l’axe du primaire. Si le guidage n’est pas parfait il peut balancer l\u00e9g\u00e8rement sur son axe ce qui a pour effet de d\u00e9placer […]<\/p>\n","protected":false},"author":10,"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":[3],"tags":[],"class_list":["post-10747","post","type-post","status-publish","format-standard","hentry","category-astrobricolage"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10747","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\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=10747"}],"version-history":[{"count":1,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10747\/revisions"}],"predecessor-version":[{"id":10904,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10747\/revisions\/10904"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=10747"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=10747"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=10747"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}