Sometimes you can see some photos of the subject and background are very clear, also seen only the subject clear, while the surrounding picture out of focus . To produce these effects , we should relate to the depth of field problems.
exposure when selecting relatively fast speed,
Herve Leger Bandage, usually we need to use relatively large aperture , then the depth of field will be rather short, clear photos will be relatively small range ,
herve leger for sale, and some scenes May be rather vague ; and if the slow shutter speed , aperture can be adjusted so small ,
Herve Leger Sale, when may also cause screen clutter dictation part you do not show up . The question is therefore how to control depth of field photography of a preliminary and important technology.
simple concept that the depth of field is a clear picture of the range photo . In theory, the only object in the focal plane is on the clear, but the identification rate of the ########## eye ,
Herve Leger Dresses, so under normal circumstances will be the focal plane before and after the performance of a number of objects is clear.
depth of the relevant factors :
1.
lens focal length lens of different focal length , depth of field will have a different . Long lens can produce a relatively short depth of field , the lens can produce a long short depth of field effect.
2.
general aperture aperture greater depth of field is shorter,
Herve Leger Outlet, the smaller the aperture , depth of field is longer.
3. lens distance from the main body
the closer the distance , then the shorter depth of field . And vice versa.
range of depth of field in general, not very special if you use the lens , depth of field can range from the front of the focal plane 1 / 3 and the rear 2 / 3 of the section.