Learn the basics of photography, the right light and graphic. Basically, an image needs light in order for it to develop.
Aperture, it is the measurement of the size of your lens. It is calibrated in F stops, the higher the number, the smaller the aperture and the smaller the amount of light for the photo. If you a looking for a good site on basic photography tips then Betterphoto is a good site for you.
Shutter speed defines the clarity of images despite movement. Higher shutter speed is needed for subjects that involve movements, it also reduces the effect of the camera shake.
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