Shallow Depth of FieldShooting on Aperture Priority Mode with a shallow depth of field, my aperture is set to f/2.8, meaning that the image's focal length is shallow and the diaphragm hole is open wide, allowing a great amount of light to pass through. My shutter speed is set to 1/800 of a second which is a moderately fast shutter speed. This means that the shutter will not open for a long time and will let in less light. Thus the pinwheel appears to be almost frozen in motion, because the shutter captured the image quickly. My IOS was at 200 because it’s not a crucial part when shooting with Aperture Priority, so I left it as default.
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Greater Depth of FieldShooting on Aperture Priority Mode with a greater depth of field, my aperture is set to f/11. This means that it has an extensive focal length and a narrow aperture opening, letting in less light. The camera automatically adjusted the shutter speed to 1/60 sec, which means that 1/60 of a second of time for exposure. This created a motion blur of the pinwheel because the shutter was open long enough for the pinwheel to spin and the camera captured the picture in motion. The 18mm focal range means that the background is not in focus, rather it seems that all subjects are in focus, except for the pinwheel. The IOS is set as default.
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Motion BlurShooting with Shutter Priority Mode, my shutter speed is set to 1/60 of a second, which is a relatively slow shutter speed so that that the pinwheel would turn while the shutter was open and I could capture the streaking and blurring of the object in motion of the picture for visual effects. Motion Blur is a great technique for capturing movement in a still image like this one. In order to get the correct exposure, the aperture had to be smaller to allow light to come in. The aperture at f/16 allows the background and girl to be in focus, but the pinwheel to have a motion effect.
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Freeze MotionShooting with Shutter Priority Mode, my shutter speed is set to 1/640 of a second, which means it was open for a very small amount of time and let little amount of light. I was able to use a moderately fast shutter speed to freeze the pinwheel's motion and capture a moment in time.The camera automatically adjusted the aperture to f/4 to allow enough light to come in so the photograph had good exposure. The aperture at f/4 creates a shallow depth of field, therefore the background is blurry, and the girl and pinwheel are the main focus.
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Over ExposedWhen the aperture is at f/7.1, more light is entering the camera therefore making the photo overexposed. It also depends on the sunlight. In this case I adjusted it to be sunny. This way, too much light will come in contact with the photo, especially when the shutter speed is set at 1/320. The slow shutter speed showed motion in the pinwheel and affected the image's brightness by allowing too much light. Slow shutter speed means the camera opens and closes very slow letting in a great amount of light. This creates a very bright image that makes it difficult for the viewer to see anything in the photo.
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Under ExposedThis image is under exposed as a result of not enough light. The reason there is not enough light is that the ISO is 200 which is sensitive and requires more light. It was taken with a small aperture of f/4.5 and a shutter speed of 1/800 sec which is fast and the reason why the pinwheel stopped moving, and it goes too fast that it isn't allowing a lot of light in too. When there isn't enough light will come in contact with the photo, the image becomes underexposed. The photo will look really dark and gloomy, making it difficult for the viewer to depict what is going on in the image.
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Low IOS |
Greater IOS |
This picture was taken using ISO 100. A low IOS value (e.g. 100 or 200) means low sensitivity to light. This is needed in bright conditions in order to avoid overly-exposed photos. It is a slow film which means it is not very sensitive to light. It requires maximum amounts of light to make a good exposure. Slow film is less grainy, but has less visual information than faster film.
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This image was taken using ISO 25600, which is an exceptionally high film speed. A high IOS value ( 800, 1600 or higher ) means it has a high sensitivity to light. This film is very sensitive to light and can be used in very low light situations to capture an image and make it clearer. The downside of fast film speeds is that the images have lots of grain and therefore can be very 'noisy'.
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