Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

1

Ou

S/O

Brevets

S/O

Description générale

Mahogany/ Wood/ Cast iron.

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

64,7 cm

Largeur

44,4 cm

Hauteur

116,8 cm

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Photographie

Catégorie

Développement des photographies

Sous-catégorie

S/O

Fabricant

Ou

Inconnu

Pays

Inconnu

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Inconnu

État/province

Inconnu

Période

Inconnu

Canada

Elwood-type enlargers were an inexpensive design and were popular for use in small portrait studios.

Fonction

Used to project an enlarged image from a negative onto a sheet of photographic paper.

Technique

This enlarger, invented by Elwood C. Rogers of Indianapolis, Indiana, is designed to evenly illuminate the negative and projected field, which consequently avoids uneven heating of the negative and possible warping of film negatives or breaking of glass negatives. In order to achieve these objectives, Rogers used a frosted or coated light bulb as the light source, as well as a non-diffusing reflector (or polished reflective surface). Between the negative and reflector, Rogers inserted a sand blasted glass screen to correct inequalities in the light rays which would otherwise pass through the negative. The rougher, more heavily blasted surface in the centre of the screen provided more diffusion of the strong, direct light rays from the bulb. According to the Focal Encyclopedia of Photography (1969), the resulting soft, diffused light produced by this type of enlarger tended to "subdue fine image detail, especially blemishes." This enlarger is also able to project both vertically and horizontally.

Notes sur la région

Inconnu

Détails

Marques

Patent info. engraved in wood reads: "PAT NO 1633228"

Manque

No lens. Glass diffuser screen appears to be missing.

Fini

Mahogany negative carrier, separate/ Incandescent light source/ Miscellaneous wood parts, separate/ Stand is cast iron painted black/ Stand is mounted on a rough wooden base/ On-off switch in the middle of the cord/ Fair condition.

Décoration

S/O