Dear Kino,
I'd be 99 per cent sure it's a repro camera for making screened negs. To clues: the rails on the floor (the camera moves ONLY to and fro) and the narrowness of the 'studio' behind the rail to the left (no room for 'creative' lighting).
Wet plates remained popular for a surprisingly long time for repro, but eventually all went over to conventional film.
Formats were vast, typically up to 30x40 inches with endless reducing backs. I've used one at the studio where I started as an assistant: we used it for making liths for masks, etc., not for repro.
Cheers,
Roger
Wet plates remained popular for a surprisingly long time for repro, but eventually all went over to conventional film.
That's a fact that has always pricked my curiosity: why indeed would repro shop do the unwieldy job of coating 30x40 wet plates? Better sharpness at that time compared to gelatin emulsion?
Because the collodion process (wet plate) made the best repro negatives. It is as simple as that. A wet-plate negative is practically grain-free, thus the grain does not produce inteference with the dot pattern screen. You state "coating 30x40 wet plates". I assure you that even though newspapers were larger than they are today, there would be very very few repro negatives coated at 30x40... The text of newspapers was not printed by offset, the linotype slugs were either printed directly, or a stereotype mat was made and a plate was poured (lead metal) to fit on the press. The photos would have been screened with a camera such as this, but even those were made into relief plates for printing.
It is only much later that whole pages of typesetting were photographed with a repro camera for making plates for offset printing.
Still, based on the photo of the repro camera Kino posted, and if it is indeed using wet-plate, it must have been quite a job when big negatives were needed.
Glass plates have the best film flattness - big film bends and sags etc.
Robert
That's a fact that has always pricked my curiosity: why indeed would repro shop do the unwieldy job of coating 30x40 wet plates? Better sharpness at that time compared to gelatin emulsion?
I buy all my supplies at Dodd in Cleveland. Maybe I should take this image in sometime and see if anyone has any info.Don't know if this is pertinent at all, but Dodd Camera has the only remaining pro photo shop in Cleveland that I'm aware of. They have a web page and you may be able to contact someone knowledgable there.
Lee
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