Digital camera basics
DSLR=Digital Single Lens Reflex: digital camera that uses mirrors to direct light from the lens to the viewfinder, which is a hole in the back of a camera that you look through to see what your taking a picture of. Lens comes off. Camera obscura Exposure: amount of light collected by a sensor in your camera during a single picture
Before taking a picture consider: Aperture, shutter speed, ISO. Aperture in a camera -aperture is a hole within a lens, through which light travels into the camera body. Every camera that we have today are designed like human eyes. Size of the aperture-large vs. small -In photography, aperture is expressed in f-numbers (ex: f/5.6). These f numbers that are known as f-stops are ways of expressing size of aperture, or how open and closed the lens is -a smaller f-stop means a larger aperture, while a larger f-stop means a smaller aperture, f/1.4 is larger than f/2.0 and much larger than f/8.0. -small apertures increase the depth of field, bringing both the main subject and background into focus. Large apertures soften background details -depth of field (DOF) is the distance to which objects behind and in front of the focal point appear to be in focus. Shutter speed-also known as “exposure time”, stands for the length of time a camera shutter is open to expose light into the camera sensor -if shutter speed is fast , it can freeze action completely -if slow it can cause motion blur, where moving object appear blurred. -shutter speeds are typically measured in fractions of a second, when they are under a second -ex: n1/4 means a quarter of a second -slowest shutter speed for handheld photography is 1/60. Anything lower then that should be on a tripod or on a straight solid surface -Any slower handheld could be blurry ISO -level of sensitivity of your camera to available light -The lower the ISO number, the ;ess sensitive it is to the light, higher ISO is more sensitivity. -Component within your camera that can change sensitivity is called image sensor or sensor. -increased sensitivity your camera can capture images in low light environments without having to use flash General rule of thumb -bright and sunny, 100 ISO -cloudy, 250 ISO -Indoors 500 ISO -night time without flash, 1600 ISO Modes on the DSLR -M-Manual control over aperture and shutter -A-Aperture Priority (Want depth of field) -S-Shutter priority -P-Camera sets shutter speed and aperture How to hold a DSLR -have camera strap around your neck at all times -Hold the camera by e lens and hand grip if possible treat with care!
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AuthorI am a senior at RBV beginning to learn about and explore photography. Archives
June 2017
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