Francia (strut folding)
Others are strut-folding, giving much more compact cameras when folded. They are also simpler, and presumably cheaper cameras. McKeown lists only a 9x12 cm mono camera. The stereo models are in 4.5x10.7 cm and 6x13 cm plate size. An example of the smaller size is shown at Ignomini.com. The lens board is very similar to that of the jumelle-style camera. It has a guillotine shutter, simpler than that on some of Mackenstein's other cameras, with only 'fast' and 'slow' instantaneous shutter speeds, plus 'B' ('Pose'). The sliding control between the lenses is the shutter cocking control, with settings 'F' (Ferme: close), 'O' (Ouvert: open; for viewing with a ground-glass) and 'A' (Arme: cock). Unlike the jumelle model, there is no focusing control. There is front rise, however. The viewfinder is a simple folding frame one.
- McKeown, James M. and Joan C. McKeown's Price Guide to Antique and Classic Cameras, 12th Edition, 2005-2006. USA, Centennial Photo Service, 2004. ISBN 0-931838-40-1 (hardcover). ISBN 0-931838-41-X (softcover). p641.
- 4.5x10.7 cm strut-folding Francia at Ignomini.com.
- 6x13 cm Francia stereo jumelle camera (archived) sold in September 2006 by Auction Team Breker in Cologne.