RE: Red Green abd Blue from B
Unless I'm mistaken, it looks like there might be some parallax between the separate color layer images (difficult to be sure with such small images with such different gray shadings). That would support a multiple-lens-camera theory. Incidently, that might also explain the color banding in the river image too.. and why he used the then-obvious three-lens-projector for viewing them. Could others better versed than I am take a look and tell if it looks like the images were all taken with a fairly long lens? It looks that way to me, and if so, then I wouldn't be at all suprised if the projector lens and film registration mechanism _was_ the camera -- simply replace the projector light source with a light-tight cover, and a shuttering mechanism (or, if the exposure are long enough, a black cloth, or lens caps, or somesuch) and viola.. one nifty three-lens camera. later, Patrick White ([EMAIL PROTECTED] [EMAIL PROTECTED]) >Regarding their speculation about how the images were made (a one-lens camera with the film moved for each >color layer,) I must say I have my doubts. They say that they don't know what his camera was like because they >don't have it or photos of it (they do show something that they THINK is LIKE what he had). I think the images >were probably made with a camera that had three identical lenses mounted on the same lens board, shot at the >same time, with some sort of linked shutters. - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
RE: Red Green abd Blue from B&W Negatives. Prokudin-Gorskii at Library ofCongress.
On 8 May 2001, at 12:58, Provencher, Paul M. wrote: > I think the images were probably made with a camera that had three identical > lenses mounted on the same lens board, shot at the same time, with some sort of > linked shutters. If you look at the shots containing water you will see movement in it indicating sequential exposure timing, I would imaging that the effects of parallax error would be quite visible if the lenses were offset by only a small distance given the subject distance, I didn't see evidence of this in the composites, in fact the registration was very good edge to edge. Quite amazing really. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 Fax +61-2-9554-9259 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://www.ozemail.com.au/~distudio/publications.html - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
RE: Red Green abd Blue from B&W Negatives. Prokudin-Gorskii at Library ofCongress.
Great stuff. It almost makes all our gyrations about electronic gizmos, coated lenses, and hot-rod emulsions seem silly. Regarding their speculation about how the images were made (a one-lens camera with the film moved for each color layer,) I must say I have my doubts. They say that they don't know what his camera was like because they don't have it or photos of it (they do show something that they THINK is LIKE what he had). I think the images were probably made with a camera that had three identical lenses mounted on the same lens board, shot at the same time, with some sort of linked shutters. I have seen hundreds of photos made from that period and it is quite common to see movement of the subject, especially with people and outdoors-objects. That makes it hard for me to imagine that these images could be made with three separate exposures, separated by seconds, and still register as well as most of them do, unless of course these are the only "keepers" from all those years of work (I doubt it). Think of it. Shoot a frame, move the film holder to the next position, change to the next filter, and then shoot again. And the exposures would have been fairly long, perhaps even seconds. Regardless of how they were made, they are quite impressive. I am sure that the school children who were lucky enough to have seen his "color" slides must have very impressed! Just my thoughts. Paul M. Provencher (ppro) -Original Message- From: Douglas E Harmon [mailto:[EMAIL PROTECTED]] Sent: Sunday, May 06, 2001 11:14 PM To: [EMAIL PROTECTED] Subject: Red Green abd Blue from B&W Negatives. Prokudin-Gorskii at Library ofCongress. Hey guy's, A link below I picked up off /. today. I've read about the RGB projection of B&W negatives before and here's a modern printing of some of those early samples. Of course to print they had to use a computer. That's why this would show up on /.. Some of these prints are amazing. You need to check out the 90+ year old pictures. Snap up the link below. http://www.loc.gov/exhibits/empire/ Douglas E Harmon [EMAIL PROTECTED] - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org . - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
Re: Red Green abd Blue from B&W Negatives. Prokudin-Gorskii at Library of Congress.
Douglas E. H. wrote: > Hey guy's, > A link below I picked up off /. today. I've read about the RGB > projection of B&W negatives before and here's a modern printing of some of > those early samples. Of course to print they had to use a computer. That's > why this would show up on /.. Some of these prints are amazing. You need to > check out the 90+ year old pictures. Snap up the link below. > http://www.loc.gov/exhibits/empire/ Yes, it is truly amazing and very interesting. (Shel provided the same link a week or two ago.) Lasse - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
