{"id":13831,"date":"2024-09-24T16:05:58","date_gmt":"2024-09-24T14:05:58","guid":{"rendered":"https:\/\/reperes-astro.fr\/?page_id=13831"},"modified":"2025-03-13T17:21:35","modified_gmt":"2025-03-13T16:21:35","slug":"la-lunette-takahashi","status":"publish","type":"page","link":"https:\/\/reperes-astro.fr\/la-lunette-takahashi\/","title":{"rendered":"La lunette Takahashi"},"content":{"rendered":"
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\"Takahashi<\/a><\/figure>\n<\/div>\n\n\n

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Tout d’abord un peu de technique :<\/strong><\/h2>\n\n\n\n

Lunette apochromatique Takahashi<\/a> FS 152, ouverture de 152 mm, longueur focale 1216 mm, rapport F\/D de 8, sur monture Losmandy Gemini. La lunette p\u00e8se \u00e0 elle seul 11kg.<\/p>\n\n\n\n

Jusqu’ici, cette belle lunette appartenait \u00e0 Claude Grimaud (Pr\u00e9sident de l’association). Il en fait don \u00e0 Rep\u00e8res<\/strong> en 2023.<\/p>\n\n\n\n

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La monture est pos\u00e9e sur une colonne fix\u00e9e sur un chariot sur rails, afin de permettre une installation tr\u00e8s rapide ainsi qu’un rangement ais\u00e9. L’ensemble peut sortir de son local ferm\u00e9 vers l’aire d’observation et est donc de suite pr\u00eat \u00e0 \u00eatre utilis\u00e9.<\/p>\n\n\n\n

Ce syst\u00e8me de chariot sur rails a \u00e9t\u00e9 cr\u00e9\u00e9 en 2015, initialement pour accueillir le LX200<\/a> qui a d\u00e9sormais son propre abris.<\/p>\n<\/div>\n\n\n\n

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\"Takahashi\"<\/a><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n

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

Cependant, en 2022, il a \u00e9t\u00e9 d\u00e9cid\u00e9 de r\u00e9unir tout le mat\u00e9riel n\u00e9cessaire pour modifier cette magnifique lunette en \u00ab\u00a0PST\u00a0\u00bb (Personnal Solar Telescope).<\/p>\n\n\n\n

Cette modification \u00ab\u00a0PST\u00a0\u00bb nous a donc permis de transformer la lunette Takahashi en instrument solaire d\u2019exception avec une focale 4500mm f\/30.<\/p>\n\n\n\n

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\"Takahashi<\/a><\/figure>\n<\/div><\/div>\n\n\n\n
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Lunette solaire Coronado,
Filtre Baader D-ERF 160mm,
Barlow T\u00e9l\u00e9centrique Beloptik x3.7.
Etalon Coronado PST,
Renvoi coud\u00e9 Coronado BF15 + filtre ITF Beloptik.<\/p>\n\n\n\n

D\u00e9j\u00e0 impressionnant en visuel, ce montage permet aussi de faire des images ahurissantes comme en t\u00e9moigne les photos ci-dessous.<\/p>\n\n\n\n

En haut \u00e0 droite de chaque clich\u00e9, la Terre mise \u00e0 l’\u00e9chelle\u2026<\/p>\n<\/div>\n<\/div>\n\n\n\n


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Coronographie et protub\u00e9rance<\/figcaption><\/figure>\n<\/div><\/div>\n\n\n\n
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Protub\u00e9rances<\/figcaption><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n

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T\u00e2ches et facules photosph\u00e9riques<\/figcaption><\/figure>\n<\/div><\/div>\n\n\n\n
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\"image<\/a>
T\u00e2ches et facules photosph\u00e9riques<\/figcaption><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n
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Tout d’abord un peu de technique : Lunette apochromatique Takahashi FS 152, ouverture de 152 mm, longueur focale 1216 mm, rapport...<\/p>\n

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