单反入门(国外英文资料).doc

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单反入门(国外英文资料)

单反入门(国外英文资料) Starting with Canon 550D, talk about digital SLR photography skills (for new people) First, loading and unloading lens method The connection between the lens and the body of the SLR camera is achieved by means of a bayonet, usually three or three outside, and a locking mortise is provided to prevent the lens from falling off the fuselage. Different manufacturers of different cameras, locking position and operation method of the device is also slightly different, so that the lens handling differences, such as the Nikon F bayonet is three knife, counterclockwise rotation installation, while the EF is in the three Canon bayonet knife clockwise installation, but there is also a difference in initial lens insertion position the positioning point of the. Why use a rotary bayonet?. First connect the camera lens and body interchangeable lenses is the use of screw, screw nut as well as (for example, a massive area of effect M42 screw), with the passage of time, the screw becomes not adapt to the new needs of users, such as screw basically can not achieve full aperture photometry. Shrink shot needs, and this is the most basic function of bayonet SLR camera, so the bayonet came into being. When you install the lens, you should carefully operate, in the process of unloading the lens to be more careful, pull out the lens must be vertical, otherwise not only difficult to pull out, but also easy to damage the lens barrel or body bayonet. When rotating the lens, the hand should hold the lens of the lens barrel. It is not appropriate to hold the iris ring or the focus ring and the zoom ring. The lens should be aligned with the red dot on the lens and the red point on the body. It will rotate in the required direction and hear the click of the click. In the sand and dust environment, as far as possible not to change the lens, so as not to dust into the mirror box, may be stained with CCD, may also enter the moving parts, leading to increased wear and tear, or even failur

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