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Richman

Images et aigrettes

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Je pensais que les 4 aigrettes qui apparaissent sur les photos astros étaient dûes aux branches du miroir secondaire.
Hors, je constate le même phénomène sur des images prises avec des lunettes.
Où est l'erreur?

Alain

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Certains ajoutent une croix devant l'objectif pour obtenir ces aigrettes, pour des raisons esthétiques

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