Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

12

Ou

S/O

Brevets

S/O

Description générale

Cast iron/ Brass/ Tin/ Wood/ Glass/ Metal/ Velvet.

Dimensions

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

Longueur

145,0 cm

Largeur

93,0 cm

Hauteur

42,0 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

Put in service June 28, 1933.

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

None.

Manque

From CA of 03/15/2002 by Matthew Bruce: No - appears complete (all catalogued parts accounted for, but not really "complete")

Fini

.1 Cast iron base, dark grey; 7 bolts on top; 4 holes in flange of each corner; counter sunk/ .3 w/Bulb; Painted black; Bottom tapers with wood guide strip & translucent glass over rectangular opening/ .4 board with strip on outside of 2 edges; Parallel guide lines inscribed inward/ .5 Wood frame holding another frame by metal clip;Glass inside smaller frame/ .6 Wood frame; Metal clips to hold insert/ .7 Wood frame holder; 2 metal clips; Clear double glass/ .8 F-45 series lens mounted on frame, all black; Adjusting ring inside/ .9 Shutter mounted on frame; Selecting speed wheel/ .10 frame w/metallic ring/ .11 Metal cone/ .12 Metal adjustable filter holder in velvet lined, leather case.

Décoration

S/O