M45 et NGC 1499. (Cyrille Masseys)

M45 et NGC 1499.

Bonjour à tous,Voilà un bon moment que je voulais réaliser cette photo de M45 et NGC 1499.Les conditions n'étaient pas simples. Le ciel s'est découvert vers 23h30 dans la nuit de mardi 25/10 à mercredi 26/10. J'ai donc sorti un peu à l'arrache tout le matériel...Il me fallait aussi shooter avec mon 50mm F1.8 II pour avoir les deux cibles dans le champ... Et bien cet objectif est juste une horreur en astro (je m'en doutais plus qu'un peu !)... La bague de mise au point n'est pas précise et avec la protection néoprène de mon matériel + le pare soleil + le chauffe objectif, c'était presque mission impossible de faire une bonne MAP ! De plus même en fermant à F3,2, il y a des aberrations chromatiques, du coma et de l'astigmatisme à gogo dans les angles... Je n'avais jamais utilisé cet objo en astro mais je ne m'attendais pas à autant de défauts. Je testerai à F4 afin de voir si j'arrive à contenir ces défauts (quitte à augmenter légèrement les ISO et le temps de pause), mais là à chaud au sortir de cette session, j'ai plutôt envie de changer d'objectif pour le coup.Il y a eu quelques passages nuageux durant la nuit qui m'ont obligé à jeter pas mal de poses. Donc en attendant la prochaine tentative, voici le résultat :Images : Canon EOS 700D + 50mm F1.8 II
Star Adventurer
100*90s à F3.2 et 1600 ISOS
50 DOF
Traitement Siril + PS

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M45 et NGC 1499.

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M45 et NGC 1499.

M45 et NGC 1499.

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