Difference between revisions of "Stereophotoskop"
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Revision as of 01:29, 20 November 2011
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The Stereophotoskop is a stereo camera made by Voigtländer, from 1904 until the 1920s.[1] It makes stereo pairs of 4×4 cm images on 4.5×10.7 cm plates, which are held in a rapid-changing magazine for twelve plates. It is a simpler forerunner of the Stereflektoskop, introduced alongside it in 1914.
McKeown presents the camera in three main models (in fact, this is a slight simplification; the specification of the second model appears to have changed significantly):
- 1904 model. The first version of the camera was available with either 60 mm f/4.5 Heliar or 60 mm f/6.8 Kollinear lenses. There is no focusing. The irises of the two lenses are connected by an external metal strip so that they stop down together. The viewfinder is a non-focusing reflex finder; essentially a brilliant finder built into the body, between the lenses. There is a spirit level mounted behind this finder. There is also a folding Newton-type finder with cross-hairs, on the left side of the camera. The lens board projects beyond the end of the body on each side (McKeown describes the camera as having 'ears'.[1]
- 1908 model. This version has focusing lenses: again either a 60 mm f/4.5 Heliar or f/6.8 Kollinear. Now both the irises and focus controls of the two lenses are connected by external metal linkages. The shutter is also improved. The shutter speed is set with a wheel (at the top of the lens board, between the lenses), and the speed setting is displayed in a window in the front of the board. On one example seen, the speed is shown only as a number 1-8;[2] however, all other examples seen display the actual shutter speed.[3][4][5] This model of the camera still has a non-focusing reflex finder and a folding Newton finder (some examples have cross hairs; others lack them). It does not have the first model's 'ears'. Some examples have a rising (and falling) front; the lens board simply slides up under pressure. McKeown shows an example of this type without the rising front.[1]
- 1923 model. This version has 55 mm f/5.5 Dynar lenses; these are fixed-focus. There is no longer a rising front. The reflex and Newton finders have both been replaced with a folding wire-frame finder on the top of the camera. However, the shutter has been replaced with a Stereo-Compur. McKeown states that the camera was sold in different versions with the plate magazine, with single plate-holders, or with a fixed film-pack adapter (a picture of this version is shown).[1]
Notes
- ↑ 1.0 1.1 1.2 1.3 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). p962.
- ↑ Various Voigtländer stereo cameras, including all three types of Stereophotoskop at Voigtländer-Archiv; the text (in German) states that the second type has shutter speeds numbered 1-8.
- ↑ Second-type Stereophotoscop with Heliar lenses and spare plate magazine; a lot in an auction in May 2007 by Rahn AG in Frankfurt. The shutter speed window clearly shows '200'.
- ↑ Second-type Stereophotoskop with Heliar lenses; a lot in an auction in September 2003 by Christies in London.
- ↑ Second-type Stereophotoskop with Heliar lenses; a lot in an auction in November 2002 by Westlicht Photographica Auction in Vienna. This example is missing both the control linkages, but the picture shows the focusing scale and shutter speed control well.
Links
- Catalogue entry for first-model Stereophotoskop (in German) at Welt der Stereoskopie.
