| 词条 | Praktiflex |
| 释义 |
| camera_name = Praktiflex c. 1940 | image_name = Praktiflex V4.jpg | type = 35mm SLR camera | lens_mount = 40×1 mm thread | focus = | exposure = | flash = | dimensions = }}{{Infobox camera | camera_name = Praktiflex 1st generation | image = Praktiflex, 1st generation_3.jpg | type = 35mm SLR camera | lens_mount = 40×1 mm thread | focus = | exposure = | flash = | dimensions = }} The CameraThe Praktiflex 35mm SLR film camera was launched in 1939[3] by the Kamera-Werkstätten AG, Dresden-Niedersedlitz.[4] Despite being quite crude, the design constitutes the pattern along which virtually every subsequent 35mm SLR camera is built, regardless of place of origin. The highly regarded 35mm SLR Kine Exakta, by Ihagee in Dresden, that preceded it by some three years, is extremely complicated by comparison, and although it provides the same functions, is quite differently built.[5] The Praktiflex has a 40mm screw lens mount, while the later Praktica models, after World War II when the factory was part of the VEB Pentacon, uses the 42mm screw mount.[3] The Praktiflex has one feature inherited from the large format plate SLR cameras that otherwise was unsolved in the 35mm SLR cameras until 1954; the instant return mirror is lifted by the power of the finger depressing the shutter release, and it returns when the finger pressure is released. The button, with a rather long travel, is placed at the right-hand camera top plate. The slanted script is embossed in the name plate in front of the collapsible waist-level finder.[6] The principal designers were presumably Benno Thorsch and Charles A. Noble.[2] VariantsSeveral finishes and improvements were implemented in the course of the production period of the Praktiflex, which was from 1939 to 1949, but probably disrupted at times between 1941 and 1946.[3] Some variations concern the colour schemes while others the mechanical details:
| camera_name = Praktiflex 2nd generation | image = Praktiflex, 2nd generation.jpg | type = 35mm SLR camera | lens_mount = 40×1 mm thread | focus = | exposure = | flash = | dimensions = | meter = }} Later modelsIn 1947 an improved Praktiflex version was launched with a new internal mechanism and a shutter release at the front that releases a spring-loaded mirror, which does not return until the camera is wound-on for the next frame. The name is embossed in gothic letters, otherwise the external body features is quite similar to those of the original model. This version is known as the Praktiflex II by collectors. The lens mount is at first the 40mm screw, but later cameras have the new 42mm lens mount, first used on the Contax S and the Praktica of 1949, since production lasted until 1951.[7] LensesOnly a small selection of standard lenses became available,[8] e.g.:
References1. ^KW active 1919 according to company WEB-page 04.28.2012: http://www.kwdo.de/deutsch/unternehmen/frameset.htm 2. ^1 John H. Noble 3. ^1 2 3 4 5 {{cite book|title=McKeown's price guide to antique classic Cameras, 12th Ed.|author=James M. and Joan C. McKeown|publisher=Centennial Photo Service, Grantsburg|year=2004|isbn=0-931838-40-1}} 4. ^{{cite book|title=Register of 35mm SLR cameras|author=Rudolph Lea|publisher=Wittig Books, Hückelhoven|year=1993|isbn=3-88984-130-9}} 5. ^{{cite book|title=A history of the 35mm Still Camera|author=Roger Hicks|publisher=Focal Press, London|year=1984|isbn=0-240-51233-2}} 6. ^{{cite book|title=Collecting and using Classic SLRs|author=Ivor Matanle|publisher=Thames & Hudson, London|year=1996|isbn=0-500-27901-2}} 7. ^1 {{cite book|title=Luttons List|author=Thomas R. Lutton|publisher=T.R.Lutton, Merseyside|year=1992|isbn=}} 8. ^1 {{cite book|title=Kadlubeks Kamera-Katalog 5th Ed.|author=Günther Kadlubek, Rudolf Hillebrand|publisher=Verlag Rudolf Hillebrand, Neuss|year=2004|isbn=3-89506-995-7}} 2 : 135 film cameras|SLR cameras |
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