On Wed, September 8, 2010 09:07, Trevor Cunningham wrote: > > On 9/8/10 4:27 PM, James Schenken wrote: >> These are not Autochrome images. >> The technique is to stack the cameras one on another with separation >> filters >> in front. The shutter is a drop shutter that is very similar to a focal >> plane shutter but placed in front of the lens assembly. As it is >> dropped, >> each camera gets exposure as the slot passes in front of the lens. >> Cool design from 100 years ago > Three cameras or plates? I couldn't imagine the registration challenge > involved with moving the camera. I haven't found any articles saying he definitely used a drop shutter system. The LoC site says they don't have a photo or design of the actual camera he used, but online sources I remember seem to think he had one lens and shutter. The images are on one continuous glass plate, anyway, that much is clear. Moving the plate accurately enough that it would work in the projector later seems like it would be a challenge to working this way, but then if he had wanted to do the easy thing he wouldn't have been trying color photography then in the first place. -- David Dyer-Bennet, dd-b@xxxxxxxx; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info
