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Perci
Joined: 15 Oct 2015
Posts: 1
Location: India
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 Posted: Thu Oct 15, 2015 10:48 am Post subject: How a bellows-based camera work? |
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Perci wrote:
I learned somewhere that, the bellows allow movements that can be used to correct distortion in a photograph and to avoid converging or diverging verticals. Use of a bellows-based camera can ensure that parallel elements in a scene remain parallel in the final photograph. Is it? |
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miran
Joined: 01 Aug 2012
Posts: 1367
Location: Slovenia
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| Posted: Thu Oct 15, 2015 12:12 pm Post subject: |
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miran wrote:
Correct. That's called lens shift. Also rise and fall. Mostly found only on large format cameras where this is the norm (along with lens tilt that alows control over plane of focus) with rare exceptions in the world of medium and small format. What lens shift does is basically you're moving the film/sensor area up/down/left/right inside the circle that the lens projects on the film/sensor plane. For this to work lenses that allow shifting naturally have to project a circle that is larger than the size of the film/sensor.
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duckrider
Joined: 11 Dec 2013
Posts: 437
Location: Germany
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| Posted: Thu Oct 15, 2015 3:43 pm Post subject: |
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duckrider wrote:
stuff to read for a week:
http://www.bhphotovideo.com/find/Product_Resources/largeformat1.jsp
http://www.toyoview.com/LargeFrmtTech/lgformat.html
and youtube videos there are also:
https://www.youtube.com/watch?v=B1JIwW7UVJs
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T*homas
(from the origin land of Zeiss, an obligation  )
Zeiss ZF 3.5/18, 2.8/25, 2.0/35, 2/50macro, 1.4/50, 1.4/85, 2/100macro
Nikon Df, F2AS, F2A, F3/T, FM
ALPA 11Si, Angulon 2,8/35 ; Xenar 1,9/50 ; Tele-Tessar 4/200
Leica R3 SAFARI Safari Lenses 2.8/28 ; 2/50 ; 4/180
Rolleiflex SL 350 , Zeiss 2,8/16 ; 4/18 ; 2,8/25 ; 2,8/35 ; 1,4/35 ; 1,8/50 ; 2,8/85 ; 1,4/85 ; 4/135 ; 4/200
Leica M9-P, Leica M4-2, Tri-Elmar "Wate", Distagon 2,8/21, Biogon 2,8/28, Biogon 2/35, Planar 2/50, Tessar 4/85, M-Elmar 50mm, Summicron 90
Sony alpha 7r & adapters for all lenses above |
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kansalliskala
Joined: 19 Jul 2007
Posts: 5025
Location: Southern Finland countryside
Expire: 2016-12-30
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| Posted: Thu Oct 15, 2015 5:04 pm Post subject: |
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kansalliskala wrote:
also it was sort of "live view" before digital sensors
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MF: Kodak DCS SLR/c; Samsung NX10; OM-10; Canon T50
Zuiko 28/3.5, Distagon 35/2.8; Yashica ML 50/2;
Zuiko 50/1.4; S-M-C 120/2.8; Zuiko 135/3.5; 200/5;
Tamron AD1 135/2.8, Soligor 180/3.5; Tamron AD1 300/5.6
Tamron zooms: 01A, Z-210
Yashicaflex C; Київ 4 + Юпитер 8, 11; Polaroid 100; Olympus XA; Yashica T3
Museum stuff: Certo-Phot; Tele-Edixon 135; Polaris 90-190; Asahi Bellows; Ixus IIs
Projects: Agfa Isolette III (no shutter), Canon AE-1D (no sensor),
Nikon D80 (dead), The "Peace Camera"
AF: Canon, Tokina, Sigma Video: JVC GZ-MG275E |
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