{"id":12528,"date":"2026-04-23T08:00:00","date_gmt":"2026-04-23T06:00:00","guid":{"rendered":"https:\/\/www.blog.neoprog.eu\/?p=12528"},"modified":"2026-04-22T16:58:41","modified_gmt":"2026-04-22T14:58:41","slug":"upgrade","status":"publish","type":"post","link":"https:\/\/www.blog.neoprog.eu\/index.php\/2026\/04\/23\/upgrade\/","title":{"rendered":"Upgrade"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

Depuis quelques mois j\u2019envisageais de mettre \u00e0 jour mon mat\u00e9riel d\u2019astro photographie. <\/p>\n\n\n\n

Je travaillais jusqu\u2019\u00e0 pr\u00e9sent avec une lunette Skywatcher Evostar 72ED et une cam\u00e9ra ASI533MC Pro. 72 mm d\u2019ouverture pour 360 mm de focale en doublet apo chromatique et 3008×3008 pixels de 3.76 um.<\/p>\n\n\n\n

Plusieurs options s\u2019offraient \u00e0 moi pour am\u00e9liorer mon setup : changer de cam\u00e9ra pour une plus grande taille de capteur et de champ ou changer de lunette pour une meilleure qualit\u00e9 optique.\u00a0<\/p>\n\n\n\n

Deux possibilit\u00e9s avec un budget restreint car fin 2025 j\u2019avais fait beaucoup de folies. Alors, d\u00e8s le mois de janvier, je me suis mis au r\u00e9gime sec, ne d\u00e9pensant que pour m\u2019offrir des albums de musique en mode digital. Je me suis \u00e9galement mis \u00e0 revendre \u00e9galement plein de choses que je n\u2019utilisais plus comme ma collection de figurines du jeu X-Wing.<\/p>\n\n\n\n

D\u00e9but avril, j\u2019avais vendu et \u00e9conomis\u00e9 suffisamment pour changer de lunette ou de cam\u00e9ra, mais pas les deux. C’\u00e9tait l’heure du choix.<\/p>\n\n\n\n

Depuis le d\u00e9but, j\u2019h\u00e9sitais entre une cam\u00e9ra ASI2600MC et une nouvelle lunette de m\u00eame focale. Dans le premier cas j\u2019am\u00e9liorerais la taille de mes images et le champ d\u2019observation, de l\u2019autre la qualit\u00e9 des images en conservant globalement les m\u00eames param\u00e8tres d\u2019observation.<\/p>\n\n\n\n

\u00c9tant donn\u00e9 que j\u2019aime beaucoup travailler avec une ouverture de 72 mm et une focale courte, j\u2019ai h\u00e9sit\u00e9 entre la ASKAR SQA70 et la RedCat 71\/350 nettement moins ch\u00e8re. Finalement j\u2019ai opt\u00e9 pour la marque ASKAR. Un quintuplet petzal apo chrolatique, c\u2019est \u00e0 dire cinq lentilles corrigeant les probl\u00e8mes de couleurs avec un r\u00e9ducteur de focale ne n\u00e9cessitant pas de g\u00e9rer le backfocus.\u00a0<\/p>\n\n\n\n

J\u2019ai command\u00e9 la SQA70 le mercredi chez Optique Uterlinden \u00e0 Colmar et jeudi \u00e0 10h elle \u00e9tait au point relais, pr\u00e8s de chez moi. Le soir m\u00eame je pointais Messier 51 depuis mon jardin et r\u00e9alisais une dizaine d\u2019images avant que les nuages n\u2019envahissent le ciel.<\/p>\n\n\n\n

Force est de constater qu\u2019il y\u00a0 a un fort saut qualitatif entre la Skywatcher Evostar\u00a072 ED et l\u2019Askar SQA70. Les \u00e9toiles sont nettement plus fines et ne subissent pas de d\u00e9formation sur les bords. L\u2019image est \u00e9galement plus piqu\u00e9e. <\/p>\n\n\n\n

Depuis j\u2019ai commenc\u00e9 \u00e0 photographier deux nouveaux objets, la n\u00e9buleuse de la flamme dans le Cocher et la Cha\u00eene de Markarian dans la Vierge. Je n\u2019ai pas accumul\u00e9 encore assez d\u2019images mais le r\u00e9sultat est d\u00e9j\u00e0 assez impressionnant. Vivement la suite !<\/p>\n\n\n\n

\n
\"\"
N\u00e9buleuse de la flamme<\/figcaption><\/figure>\n\n\n\n
\"\"
Cha\u00eene Markarian<\/figcaption><\/figure>\n<\/figure>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Je travaillais jusqu\u2019\u00e0 pr\u00e9sent avec une lunette Skywatcher Evostar 72ED et une cam\u00e9ra ASI533MC Pro. 72 mm d\u2019ouverture pour 360 mm de focale en doublet apo chromatique et 3008×3008 pixels de 3.76 um. Continuer la lecture →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":12530,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"footnotes":""},"categories":[2810],"tags":[3806,3105,351,3807],"class_list":["post-12528","post","type-post","status-publish","format-image","has-post-thumbnail","hentry","category-astro","tag-askar","tag-lunette","tag-materiel","tag-sqa70","post_format-post-format-image"],"yoast_head":"\nUpgrade - Le Blog du N\u00e9oprog<\/title>\n<meta name=\"description\" content=\"Le Blog du N\u00e9oprog astronomie upgrade mat\u00e9riel lunette ASKAR Skywatcher cam\u00e9ra photographie ciel n\u00e9buleuses galaxies \u00e9quipement achat\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.blog.neoprog.eu\/index.php\/2026\/04\/23\/upgrade\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Upgrade - 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