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AMIS DES SELS D'ARGENT • Afficher le sujet - format 4X5
Page 1 sur 1

format 4X5

MessagePosté: Jeu 3 Juin 2010 08:53
de philippe C
Bonjour!
J'ai la possibilité de récupérer un vieil agrandisseur dont la fenêtre utile du passe vue est de 8x11cm.
Peut-on utiliser l'agrandisseur pour agrandir le 4X5 inch?
Quel est la taille standart des fenêtres de passe vue des agrandisseurs pour les plans films 4X5 inch?
Enfin quel est la focale de l'objectif d'agrandisseur la plus adaptée pour le 4X5?
Bien amicalement,
Philippe.

Re: format 4X5

MessagePosté: Jeu 3 Juin 2010 20:29
de Bernard
Salut
Perso j'ai du 95/121 (mm) sur les passes vues dédiés au 4/5;
L'agrandisseur est un LPL 7450;
L'optique utilisée est un 105, il se dit du 150 pour le 4/5 aussi.
Voilà

Bonnes images

Bernard

Re: format 4X5

MessagePosté: Sam 5 Juin 2010 09:01
de Olivier G
Bonjour Philippe,

La focale normale du 4x5" est le 150mm... il te faudra donc un 150mm pour tirer tes négatifs.

Re: format 4X5

MessagePosté: Sam 5 Juin 2010 11:07
de jean paul Royer
Bonjour,

IL faut agrandir le passe vue a la lime sinon vous contenter du format dit 9/12 pour l'objectif un 135mm permet de tirez lesdeux format 4/5" et 9/12cm

Re: format 4X5

MessagePosté: Mar 8 Juin 2010 07:54
de Ron Talis
Bonjour, en plus de la fenêtre utile il faut vérifier que le plan/film rentre dans le passe vue
sans être abimé (froissé, plié...). L'objectif va aussi dépendre du système optique de l'agrandisseur.
Síl y a un condenseur, il faut choisir la distance focale adaptée. Si c'est un système à lumiére diffuse,
il suffit de contrôler si l'objectif couvre le format sans trop de vignetage.

Re: format 4X5

MessagePosté: Mer 9 Juin 2010 21:08
de Bernard

Re: format 4X5

MessagePosté: Jeu 10 Juin 2010 10:42
de jean paul Royer
Bonjour,

Si votre surface sensible est de 95/121mm votre passe vue doit au moins être de cette dimension ou légèrement plus petite dans les 93/119mm. Si vous modifiez votre passe vue vous ne pourrez plus tirez du 9/12.
Mes plans films ont les mêmes dimensions que les vôtres, tous les châssis ont les mêmes cotes.
Un plan film 9/12 a une surface utile proche des 8/11cm. Les châssis 4/5 n’acceptent pas les films 9/12 ils flottent dedans par contre ils ont les mêmes dimension externe donc bien regardez sur le châssis s’il est 4/5 ou 9/12