Digital Photography and Imaging - Week 5

 PHOTOGRAPHY/WEEK 5

Low Li Vern (0362678)
Digital Photography and Imaging
Bachelor of Design (Hons) in Creative Media
Week 5 / Exercise

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LECTURE

EXPOSURE SETTING

• EXPOSURE: In photography, exposure is the amount of light which reaches your camera sensor or film.

• The main parts of the camera: Camera body, Shutter, Image sensor, LCD screen, Camera lens ,Aperture/ Iris. The camera body is a light proof box.

• IRIS,SHUTTER, SPEEDISO: There are only two camera settings that affect the actual “luminous exposure” of an image: shutter speed and aperture. The third setting, camera ISO, also affects the brightness of your photos.

• IRIS: Iris/Aperture is control the flow of light entering the lens

• IRIS: Iris/Aperture is measured by f-stop, indicated by sequence of f-number: f/1, f/1.4, f/2 , f/ 2.8, f/ 4, f/ 5.6, f/ 8, f/ 11, f/ 16, f/22 , f/32..The lower the f-number, the larger the lens opening.

• SHUTTER: The shutter is a small plastic sheet that opens and closes to allow light onto the film or prevent light from reaching the film. 

• SHUTTER SPEED: Shutter speed is measured in seconds: 1/1000 s,1/500 s,1/250 s,1/125 s,1/60 s,1/30 s,1/15 s,1/8 s,1/4 s,1/2 s,1 s, 2 s, 3 s…

• ISO: Originally referred to the sensitivity of film—it's "light gathering" ability. For digital photography, ISO refers to the sensitivity—the signal gain—of the camera's sensor.

• ISO: The common ISO camera settings are: 100, 200, 400, 640, 800, 1600, 3200, 6400….

• The lower the number of ISO the less sensitive your camera is to light and the finer the grain.

LENS PERSPECTIVE

• The are wide angle lens, standard lens and tele lens.

• Appropriate lens provided desire framing, lens choice affects angle of view.

• Different lenses are designed for different for different purposes. Lenses can be categorized by FOCAL LENGTH.

• FOCAL LENGTH:  The shorter the focal length, the wider the angle of view and vice-versa.

• FOCAL LENGTH: Focal length is the measurement (in millimeters) from the optical center of a camera lens to the camera’s sensor.

• DEPTH OF FIELD:  The proportion of the image that is reasonably sharp and in focus.

• DEPTH OF FIELD:  The smaller the aperture you use, the greater the depth of field.

• Wide angle lenses are ideal for fitting a large area into your frame. 

• Wide angle lens is especially useful for landscape photography or street photography. With wide angle lenses, almost everything is in focus, unless your subject is very close to the lens.

• Standard lens offer a fairly accurate representation of what the human eye sees, both in terms of visual angle and perspective. 

• Images created by standard lens are perceived as more natural than those taken with other types of camera lenses.

• Tele lenses are great for isolating a subject that is far away. 

• Tele lenses allow you to photograph subjects from a distance thanks to their magnification. 

DSLR V.S SMARTPHONE

• Smartphones vs Cameras = Convenience vs Quality: DSLR cameras are designed to capture images. Phones are designed to carry out a multitude of functions.

• Phone cameras are very limited by size. The size of the lens and the size of the sensor that captures the photos. Entry-level DSLR have much larger lenses and sensors than mobile phones do.

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Next : Digital Photography and Imaging - Week 6

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