CAMERA EXPOSURE
A photographs exposure determines how light or dark an image will appear when it’s been captured by your camera. Believe it or not, this is determined by just three camera settings, APERTURE, ISO and SHUTTER SPEED (the exposure triangle).
EXPOXURE TRAINGLE: APERTURE, ISO and SHUTTER SPEED
Aperture: controls the area over which light can enter your camera
Shutter speed: controls the duration of the exposure
ISO speed: controls the sensitivity of your camera’s sensor to a given amount of light
Aperture
In my view aperture is where a lot of the wonderful happens in photography.
What is Aperture?
Aperture is a hole within a lens or Aperture is the opening
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The larger hole opening from the lens the more light that gets inside and the smaller hole opening from the lens the less light get inside.
The size of the opening is measured in “F-Stop” number.
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This number normally falls between 1.4 and 32 but can go slightly beyond that range. Standard f-stop numbers would be as follows: 1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22 and 32.The large apertures (where lots of light gets in) are given f/stop smaller numbers and smaller apertures (where less light gets in) have larger f-stop numbers.
The images below show the effect of aperture on the exposure of the photo. The images show shots using the largest lens opening to the smallest. In this example, the ISO and shutter speed remain constant to isolate the effect of aperture on the exposure of the photograph.
In the example photos above, the photo taken at F/5.6 has the correct exposure. Did you notice that the photos taken with wider aperture is overexposed and photos taken with smaller aperture is underexposed.
The Aperture Priority Mode is usually represented by an Av or an A on your camera
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My camera sensor only needed 1/2000th of a second to fully capture this photograph. Now what would have happened if I had ISO 100 on my camera instead? My sensor would have needed 8 times more time to capture the same scene, which is 1/250th of a second. At that speed, I would have introduced motion blur into my picture, because the birds were moving faster than that. In short, I would have ruined the picture.
When to use low ISO
When there is plenty of light, you should always use the lowest ISO, to retain the most detail and to have the highest image quality. There are some cases where you might want to use low ISO in dim or dark environments – for example, if you have your camera mounted on a tripod or sitting on a flat surface. In that case, bear in mind that your camera will most likely need more time to capture the scene and anything that is moving is probably going to look like a ghost. Just kidding, of course! That’s my lovely nephew being the subject of my long exposure test. I set the camera to the lowest ISO to retain the detail, which also resulted in a long exposure of 5 seconds. My nephew sat still, while my friend stepped in for a brief moment to introduce the ghost
There are several other stories that I wish to share with you, but I will do so in Chapter 12, It’s All in the Photographs: The Ghost Writers. My daughters Stephanie and Megan, Ken O’Keefe, Scarlett McGrady, Leigh Schillings Edwards, Jon Matney, and I make up the key members of this team of paranormal investigators. Pamela Wilson Berry serves as an auxiliary member. During a photo shoot on November 1, 2014, at St. Albans, I took a series of photographs of what appeared to be a white mist (ectoplasm) as it developed into a humanoid form. I also share those photos with you in this chapter.
“There is in fact no such thing as an instantaneous photograph. All photographs are time exposures, of shorter or longer duration, and each describes a discrete parcel of time.” -John Szarkowski Photography consists of a tracing of time; the duration of the photograph’s exposure time determines the resulting image. Photography is fundamentally a time-based medium.
Investigating the Effect of Light Intensity on the Size of a Plantain Leaf Title: To investigate the effect of light intensity on the size of a plantain leaf. Hypothesis: I predict that the size of the plantain leaves would increase as the light intensity decreases. Therefore, plantain leaves found in the shade will have larger surface areas than leaves found in an open area. Theory: Sunlight is an essential factor need to complete the process of photosynthesis.
room, the camera is irrelevant, its purpose is muted and is only operational again when light
projected its rays through the tinted glass... But in the western or black chamber the effect of the
capture the full effect of light during this short period of the day with the study
The iris acts to control the size of the pupil. In bright light, the iris is dilated in such a way as to reduce the size of the pupil and limit the amount of entering light. In dim light, the iris adjusts its size as to maximize the size of the pupil and increase the amount of incoming light.
The reason light intensity is being used compared to whether or not a plant needs light. It is because The experiment wants to show that the rates of photosynthesis will vary according to how much light from a light bulb will be trapped in. the chloroplasts, in the leaf. The more energy trapped the more efficient a chemical reaction can take place and the speed of photosynthesis will increase. There are many things which can affect the photosynthesis of a plant such as light intensity, temperature and carbon dioxide levels.
Since its inception, photography has been used to capture moments in time all around the world. This wonderful technology has existed since ancient times, and has only improved in recent history, changing society in the process.
As you can see, there is a big world waiting for you to capture and mold its image. Whether you just want to remember that sunset on your honeymoon, your little one’s first steps or even if you click your shutter at everything you pass… the right equipment certainly helps. Whatever equipment you use, with good lighting and attention to such details as film type and speed, distance from subject, rule of thirds, and an eye for what you want, you can make beautiful photos that you and yours will cherish for generations to come.
This is the same if there is the light intensity is too high as this can damage the chloroplasts in plants and this will minimize the rate of photosynthesis. As shown in the graph as the light intensity increases, the photosynthesis rate increases until a point is reached where the rate begins to level off into a plateau. At a low light intensity, photosynthesis occurs slowly because only a small quantity of ATP and NADPH is produced. As the light intensity shown in the graph is gradually increasing, more ATP and NADPH (NADH is used in cellular respiration and NADPH is used in photosynthesis) are produced, which means more oxygen and sugar is produced, therefore increasing the rate of photosynthesis. But as the light intensity increases even more and past a certain light intensity on the graph, this is due to the other factors such as carbon dioxide limiting the rate of
Tye, T. (2003). Role of Light and Illumination in Photography ? PictureCorrect. Retrieved from http://www.picturecorrect.com/tips/role-of-light-and-illumination-in-photography/
What do you consider art? Paintings, sculptures, drawings, or maybe something else. I know, when I think of art, I think of photography. Photography Is used for business, science, manufacturing, art, recreational purposes, mass communication, and more. Photography is using light to do amazing things, and some people think of photography as a story that just needs to be told. Ansel Adams probably believed this. He said, “You don’t take a photograph, you make it.” Photography has a long interesting history, like the fact that the word photography is made up of two greek words, photos meaning ‘light’ and graphein which is ‘to draw’ ! Photography also has some complicated techniques to get a hang of taking good photos. Have you heard of the rule of thirds? Or do you know how a camera works? Well, that will all be explained. Maybe, by the end you will take up photography too. This essay will explore the history and types of cameras and the basic rules for taking photographs.
All the direct and indirect techniques that are used to produce an image of the