![\"\"](\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2025\/06\/16_20080529-M51_Comp4-300x192.jpg\")
<\/a><\/p>\nLes rapports en luminosit\u00e9 \u00e9tant +\/- : 200=0.9 212=1 255=1.5 355=2.8
\nUne pose cumul\u00e9e de 50′ avec le 200 = 16′ au 355mm
\nUne pose cumul\u00e9e de 120′ avec le CN212 = 43′ au 355mm.
\nUne pose cumul\u00e9e de 60′ avec le 255mm = 40′ au 355mm.
\nCet effet est mis en \u00e9vidence par l’apparition d’\u00e9toiles plus faibles.<\/p>\n
Analyse<\/strong> – \u00e9quivalence poses au 355 sur M51, magnitudes de SKY6pro
\n200(50′)=16′ atteint la magnitude 15
\nCN212(120′) = 43′ et 255(56′)=37′ atteignent la magnitude 16
\nLe 355mm=90′ devrait gagner une magnitude. Or, il en gagne 2, ce qui laisse supposer que la STL est 2 x plus sensible que les cam\u00e9ras… mais aussi beaucoup plus co\u00fbteuse !<\/p>\nAndr\u00e9,<\/p>\n\n\n
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Veuillez voter<\/span>\n <\/div>\n <\/div>\n","protected":false},"excerpt":{"rendered":"Auteur: Andre Fryns (frynsandre@gmail.com) Comparaison de M104, poses de 74′ pour 355mm de Sterpigny, 68′ pour le 255mm de Nandrin. Diam\u00e8tres Le diam\u00e8tre n’ajoute pas \u00e9norm\u00e9ment de d\u00e9tails (d\u00e9finition proportionnelle \u00e0 celui-ci), mais bien de la luminosit\u00e9. Cameras Je suis surpris de la qualit\u00e9 des cameras num\u00e9riques couleurs qui rivalisent avec les CCD. A noter […]<\/p>\n","protected":false},"author":7,"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-8665","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/8665","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\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=8665"}],"version-history":[{"count":2,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/8665\/revisions"}],"predecessor-version":[{"id":16142,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/8665\/revisions\/16142"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=8665"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=8665"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=8665"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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