[LargeFormat] Ultrabiglargeformatcamera

[Jim Brick]

The camera is a process camera, used by the semiconductor and printing 
industries for decades. I ran one of these in the early 60's. As process 
cameras go, this one is not particularly large. Those used for making 
semiconductor masks make this one look like a toy.

Process cameras for the printing industry used arc lamps (later pulsed 
xenon lamps) and were used to make line and halftone negatives.

Process cameras for the semiconductor industry used a very sharp cutoff 
green light and lenses that were made to be exceedingly sharp only at that 
one wavelength. These cameras were made to be able to reduce man made 
semiconductor layer tape-ups (very large) down to microscopic size for 
masks from which to manufacture integrated circuits.

The big process cameras were focused by the numbers. Not a loupe and ground 
glass. A crank on the back to dial-in the number for the percentage reduction.

Jim


At 10:45 PM 3/5/2003 +0100, Huib Smeets wrote:
>Hi,
>
>Who thinks that he has out-grown his 20x24" camera???
>
>In a german newsgroup someone is offering a LF camera for free see:
>http://www.englers-welt.de/grosskamera/grosskamera.html
>
>It was used to make reproductions.
>
>If nobody wants it, it will be moved to the junkyard and it will be
>destroyed.
>
>Some spec's: negativesize: 1mtrx1mtr (40"x40")
>extension 8 to 10 meters (24' - 30')
>
>Huib
>http://home.plex.nl/~hsmeets