Control lens aperture is the amount of light in the size of the device. The size of the aperture and shutter speed open joint decision digital camera canon eos 550d charger to accept how much light sensitive components, and we decided the photo exposure value.
The aperture is by a piece of special shape of the thin metal plates component is a kind of round by the light of the mechanical device, through the control of their opening aperture to control the amount of light into the camera,canon eos 5d charger and complete the exposure.
Aperture in addition to control the exposure, the depth of field, for the quality and optical lens absolute relationship. Generally speaking, large aperture is not the most ideal and the imaging quality of light, this is because the camera lens is concave and convex by of, have the middle thick surrounding thin, thin around the middle or thick characteristic and so cause among lenses with uneven thickness is next to the situation, in this kind of structure, the impact of the largest open when aperture, relative had used up the edge of the canon eos-d60 charger scene, right now can produce picture around the contraction of error, and reduce the imaging quality photos.
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