El que cobreix el Dallmeyer / Dallmeyer vignetting

IN ENGLISH BELOW THE LINE

Ferrotip de format 18x24 cm, realitzat amb una càmera GOMZ FK 18X24, fabricada a Leningrad el 1960; objectiu petzval Dallmeyer Quick Action Portrait 2B, fabricat el 1874; col·lodió Quinn's Quick Clear fet per mi; revelador també casolà, amb nitrat potassic afegit.

Provant els limits del Dallmeyer en format 18x24 (quasi 8x10 polzades). A certa distancia obviament no cobreix ni de lluny, però crec que a distancia de retrat el cercle sera suficientment gran.

Les plaques de col·lodió es realitzen al moment, cobrint una placa de vidre o planxa metal·lica negra amb col·lodió i sals de cadmi i/o potassi, sensibilitzat amb nitrat de plata. Aleshores s'ha de fer la fotografia i revelar-la en uns 5 minuts, abans no s'assequi la emulsió. És un dels processos fotogràfics més antics del món, inventat el 1851, i que dominà fins el 1880. Però ara ha resorgit, ja que les imatges, molt treballades, que dona són úniques, màgiques i i irrepetibles.

ca.wikipedia.org/wiki/Col%C2%B7lodi%C3%B3_humit

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Tintype in 18x24cm format, made with a GOMZ FK 18X24 camera, made in Leningrad in 1960; Dallmeyer Quick Acting Portrait 2B petzval lens made in 1874; Quinn's Quick Clear collodion, home made; developer with potassium nitrate added.

First trials of the Dallmeyer Q.A.P. 2B lens. At this distance it obviously not covers the plate, but probably will do at portrait distance.

The collodion plates are made covering a glass plate or black metal plate with collodion and salts of cadmium and / or potassium, sensitized with silver nitrate. Then you have to take the photo and reveal it in about 5 minutes, before the emulsion dries. It is one of the oldest photographic processes in the World, invented in 1851, and which dominated photography until 1880. But now it has resurfaced, as the images, very elaborate to create, that it gives are unique, razor sharp, magical and unrepeatable.

en.wikipedia.org/wiki/Collodion_process

intrepidcamera.co.uk/blog/rikard-osterlund-guide-to-wet-p...

Taken on: February 20, 2022

Tags:

wetplate

placa humida

colodión

collodion

plate photography

XIX Century

vintage

large format

alternative

wet plate collodion

stare

camera

18x24

GOMZ

objectiu

objectif

lens

linsen

Petzval

llautó

laton

laiton

brass

Dallmeyer

portrait

quick acting

Quinn

Quick Clear

homemade

DIY

potassium nitrate « less

Sets appears in: • Ulls vells / Old eyes • Gran format / Large Format more » • Plaques de col·lodió / Wet plate collodion « less

Groups appears in: • alternative processes printing (read rules please) • LONGEXPOSURE more » • Tintypes, ambrotypes, Wet-plate Collodion photographs • alternative photography process • *Flickr en català! • "Exemplary Shots - Flickr's BEST! (Post 1 Award 3)" • Afrairament occitanocatalan - Agermanament occitanocatalà • "World Trekker" (Post 7 - Award 3) • Size Matters • Petzval Lens Photographs • AlternativePhotography.com • FKD large format • Wet Plate Collodion Ambrotype TinType and else... « less

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