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Posts for: gmartin4
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May 4, 2017 13:17:40   #
Black and White is just one combination. Se the entire article here:
https://digital-photography-school.com/use-monochrome-color-photography/?utm_source=newsletter&utm_medium=email&utm_campaign=May-0417
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Mar 24, 2017 08:43:32   #
aellman wrote:
OMG Why not just send that one person a private message?


Jesus Christ, I'm really thinking to quit from this forum.
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Mar 23, 2017 22:58:18   #
Thank you all for your comments. More that 800 people, most of them members, had seen this topic. On of those is a partially color-blind fellow member. He left me a very positive private message that empower me to continue posting articles that could be unrelevant for the mayority, but if the info help just one member, that is enough for me.
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Mar 22, 2017 14:14:41   #
I have the 1430 with a continous ink sistem installed by me and a Printer potty to collect wasted ink. I have a key to reset the waste pad counter and also use Qimage to overdrive the DPI to 1440. I have the Datacolor Elite Printer/Monitor calibrator with a colorimeter and I created my own ICC profiles. With that set up I use third party ink and paper and don't mind about the cost of paper and ink when I want to print just for fun. I print beatiful pics at lower cost.
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Mar 22, 2017 11:42:54   #
Dear Thomas902, Thanks for the link. And yes, I'm a computer technician that repair the large format Inkject printers from 17 to 64 inchs wide. I had severals training in the Ink jet industry that I like to share with the brother's in photography. My data could be unrelevant for many of you here, but I have faith that photography is not only for "baby boomers", like you and me (I'm 59). I understand that UHH does not reject 15 year old rookie that wants to be part of our forum, and those brothers appreciate the knowledge I'm introducing. Just keep reading and finally you will se what I'm traying to explain.
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Mar 22, 2017 08:46:39   #
How is Color Perceived?

Objects in nature derive their color from colorants they possess that absorb or subtract certain wavelengths of light while reflecting other wavelengths back to the viewer. For example, a red apple really has no color; it merely reflects the wavelengths of white light that cause us to see red and absorbs most of the other wavelengths. The viewer (or detector) can be the human eye, film in a camera or a light sensing instrument. The human eye contains two basic types of light receptors: rods and cones. The rods are sensitive only to the presence of light, not color. The cones are sensitive to color. During normal daytime vision, it is the cones, not the rods, that actively contribute to vision. At night, the more sensitive rods take over and give us night vision. There are three groups of cones, each sensitive to a portion of the visible color spectrum - red light,
green light and blue light. The brain receives signals from the cones, processes them, then evokes the sensation of color. Various combinations of light waves evoke the sensation of other colors. Color perception varies from person to person. Perception is a subjective phenomenon influenced by many variables including the light source, surrounding colors, mood of the viewer and individual variations in
our visual systems. A small number of people have color-deficient vision. The most common form is the inability to distinguish between reds and greens. These
people are considered color blind. This phenomenon may result from one type of cone missing or a defect that affects analysis in the brain. Color blindness affects
about 8% of men and less than 0.5% of women.

Stay tunned for the next chapter : How is Color Reproduced?
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Mar 21, 2017 13:01:47   #
What I liked most of this article is that you can teach yourself of what the camera did in auto mode when you read the EXIF data. Then you can use the same setting in manual mode and modify one at the time to see the differences.
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Mar 21, 2017 11:21:06   #
In fact, there are some clear benefits to using Auto. So, I’d like to explore some of its advantages and offer a few reasons why you shouldn’t feel so bad if you set your expensive DSLR camera on that familiar green Auto setting. Follow the link below for the entire post.

https://digital-photography-school.com/benefits-shooting-auto-mode/?utm_source=newsletter&utm_medium=email&utm_campaign=Feb-1617
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Mar 20, 2017 17:26:34   #
That was on another Topic. I don't hurt anybody if I create a custom profile for his needs. There are topic here of people asking for custom prifiles. Do a research for custom profile and you can see.
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Mar 20, 2017 07:24:22   #
Thanks Gene51. You made my day. Hope there are just one Rongnongno here. We can tolerate one.
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Mar 19, 2017 19:13:31   #
Wao! Looks like I'm in the wrong forum. I was thinking this is a forum to teach each others about the huge world of photography. Photography is not my business, but my passion. Just tell me "get out from here" and I will leave to another forum in wich the people appreciate free learning about the beatifull world of Photography.
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Mar 19, 2017 16:14:07   #
The final purpose of these posts is to understand how the Inkject family of printers reproduce the color taken by your camera. I will cut them in short themes trying not to bore you.

What is Color?

Imagine a world without color - for that is what really exists. All the objects that surround us have no color. Color exists only in our minds. Color is a visual sensation that involves three elements; a light source,
an object and a viewer. Light from the sun or another light source strikes objects around us, is reflected and modified by the objects, then reaches the receptors in our eyes and is interpreted by our brains into something
we call color. Since color exists only in our minds, explaining the physical aspects of color is just part of the story. The way objects appear to us and the judgments we make about color are determined by a combination
of many factors. Some of the factors are easy to measure and some are not. Individual perceptual differences, eye fatigue and mood of the viewer are as important to a discussion about color as are the properties of light
sources and objects. Colors as perceived by the human eye cannot be simulated by any instrument, nor can they be reproduced by any printing process. Light is essential for vision. Light causes color. Without light, color would not exist. Light that appears white to us, such as light from the sun, is actually composed of many colors. Each color has its own measurable wavelength or combination of wavelengths. (Light travels in waves much like waves produced by dropping a pebble in a pond, except light waves are extremely small.) The wavelengths of light are not colors, but produce the sensation of color. Light is a form of energy.All wavelengths of light are part of the electromagnetic energy spectrum. The spectrum is a continuous sequence of energy waves that vary in length from short to long. Visible light - the wavelengths our eyes can detect - is a small portion of the entire spectrum. At one end of the visible spectrum are the short wavelengths of light we perceive as blue. At the other end of the visible spectrum are the longer wavelengths of light we perceive as red. All the
other colors we can see in nature are found somewhere along the spectrum between blue and red. Beyond the limits at each end of the visible spectrum are the short wavelengths of ultraviolet light and X-rays and the long
wavelengths of infrared radiation and radio waves which are not visible to the human eye. We can separate a beam of white light into its component colors by passing it through a glass prism which causes the light beam to bend. Each wavelength, or color, bends at a slightly different angle which separates the white light into an array of colors. When the sun comes out after a rainstorm, water droplets in the air can act as prisms and display the arc of colors in the sky we see as a rainbow. If the visible portion of the rainbow is divided into thirds, the predominant colors are blue, green and red. These are the primary colors of light. Visible colors can be arranged in a circle, commonly known as the color wheel. Blue, green and red form a triangle on the color wheel. In between the primary colors are the secondary colors, cyan, magenta and yellow, which form another triangle.

Keep posted because I will explain some terms found in your editor that you use but, probably you do not understand.
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Mar 16, 2017 17:23:11   #
I'm a US citizen helping US citizen that are in the same hobby. Photography is my hobby, not my business. I 'am an Epson certified Electronic Technician tha repair the large format printers up to 64" wide. I know the Inkjet industry inside and out and service is my life. That's why I like help others.
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Mar 16, 2017 16:58:48   #
I send to you via email 7 pages that you have to print using (of course) your paper, your ink and your printer. You ship them back to me and I create yor custom profile. Then I send it to you via email. You install it in your computer and test it. If you are fully satisfied, then you paid me $25.00 via Paypal. That's it. If you are not fully satisfied you don't pay. But that way you don't have to buy an expensive colorimeter and you can find if a colorimeter is a solution for you before buy one. Basically I making you a favor. My effort worth more that $25.00 bucks.
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Mar 16, 2017 16:55:10   #
Deleted.
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