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LLB!
Joined: 26 Aug 2020
Posts: 59
Location: Belarus
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 Posted: Wed Sep 02, 2020 4:51 am Post subject: The color accuracy of all digital cameras today is a Chimera |
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LLB! wrote:
As I discovered when copying paintings by artists of the 19th and 20th centuries (this was my work), no digital camera can convey the exact color.
The Best Cameras for Color Reproduction, Ranked
By Greg Scoblete
https://pdnonline.com/gear/cameras/the-best-cameras-for-color-reproduction-ranked/ |
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TeemÅ
Joined: 07 Apr 2016
Posts: 586
Location: Australia
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| Posted: Wed Sep 02, 2020 5:12 am Post subject: |
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TeemÅ wrote:
Would have been more interesting with a Foveon camera tested, and even Provia film. I would have thought there is better colour accuracy using a filtered RGB or monochrome sensor and then recombining the images. Most cameras are just using Sony sensors nowadays, so the results shouldn't be too different and without any explanation, then maybe the differences actually come down to the image processor in each camera.
Given the importance of the task, isn't there any commercial-\industrial-grade archival scanner that prioritises colour accuracy? |
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calvin83
Joined: 12 Apr 2009
Posts: 7588
Location: Hong Kong
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| Posted: Wed Sep 02, 2020 5:16 am Post subject: |
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calvin83 wrote:
I read the article below in the past. It may give better idea for those who will use the camera for color critical works. I think a lens with good sharpness and minimum chromatic aberrations is perfected.
Use of commercial off-the-shelf digital cameras for scientific data acquisition and scene-specific color calibration
https://www.osapublishing.org/josaa/abstract.cfm?uri=josaa-31-2-312
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LLB!
Joined: 26 Aug 2020
Posts: 59
Location: Belarus
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| Posted: Wed Sep 02, 2020 5:59 am Post subject: |
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LLB! wrote:
"I think a lens with good sharpness and minimum chromatic aberrations is perfected."
As far as I remember, there is a numbers that all lenses must follow: 11-0-0. Deviations from these values indicate whether the lens will give a warm or cold shade. |
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ylyad
Joined: 01 Jun 2010
Posts: 476
Location: Zentralschweiz
Expire: 2013-12-05
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| Posted: Wed Sep 02, 2020 6:03 am Post subject: |
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ylyad wrote:
Not exactly but closely related, it reminded of this article I read recently: https://www.imaging-resource.com/news/2020/08/18/fujifilm-film-simulations-definitive-guide
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Camera: Fuji X-E2, Fuji X100T
MF: Canon nFD 50/1.4, Canon nFD 100/2.8, Tokina RMC 135/2.8
Tamron SP 24-48/3.5-3.8
http://www.flickr.com/derdide/
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visualopsins
Joined: 05 Mar 2009
Posts: 11067
Location: California
Expire: 2025-04-11
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| Posted: Tue Jan 12, 2021 4:37 pm Post subject: Re: The color accuracy of all digital cameras today is a Chi |
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visualopsins wrote:
 My (lesser) experience also! Some parts of the paintings would disappear and reappear when I tried various corrections! Canon 5D classic. Member Ernst Dinka has some related materials about the other paintings photography nightmare -- printing. http://www.pigment-print.com/spectralplots/spectrumviz_1.htm
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Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX-A ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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DConvert
Joined: 12 Jun 2010
Posts: 921
Location: Essex UK
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| Posted: Tue Jan 12, 2021 6:01 pm Post subject: Re: The color accuracy of all digital cameras today is a Chi |
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DConvert wrote:
The concept of exact colour is pretty flawed.
People see things differently, especially when there are wavelengths near the edge of visual perception present. Some people will be able to see wavelengths others can't.
Then there are mixtures of wavelengths that look identical to another wavelength...
Digital cameras are designed to give good results for the average human. |
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LLB!
Joined: 26 Aug 2020
Posts: 59
Location: Belarus
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| Posted: Wed Jan 13, 2021 8:54 am Post subject: |
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LLB! wrote:
Color vision is a unique natural gift. Few creatures on Earth are able to distinguish not only the contours of objects, but also many other visual characteristics: color and its shades, brightness and contrast. However, despite the apparent simplicity of the process and its ordinariness, the true mechanism of color perception in humans is extremely complex and is not reliably known. To this should be added only the doctor who checks your vision is able to determine whether you feel all shades of color at all or not. It is also obvious that camera manufacturers are not serious about the problem of color accuracy. People prefer bright colors, delicious food, and so on. Reality and truth are uninteresting.
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