Digital camera aperture is another very important physical parts, digital camera is still camera, again good lens if no good aperture also won't have the ideal effect, with advanced camera JVC GR-D270 Battery loaded on the lower film also won't produce good photos as is the same way.
Aperture are usually located in the central of lens, it is a ring, can control round hole opening size, control the brightness of the jvc gr-dvm70 battery light exposure. When need a lot of light for exposure, will aperture round hole up; If need only a light exposure, will round hole reducing, let a small amount of light to enter.
Aperture in a scene by installed in the leaf blade control, and the blade is moving. The greater the aperture and lens of the blade in the open. The so-called "maximum aperture", it is no action leaves, let the light can be shot through all came in the full open aperture. And the smaller aperture, leaf is JVC GR-D63 Battery the contraction of the complete harm, finally be narrowed down to a small dot.
The function of the aperture is like our human eyes Ma rainbow, is used to control the filming, unit of time into the amount of light, general with f / 5, F5 or 1:5 to mark. Based on the actual character, smaller f value the aperture of the larger said.
The calculation of aperture we call aperture unit value (f-number) or series (f-stop). First of all, let's talk about aperture value.JVC GR-D370 Battery
The aperture of the standard value (f-number) of the Numbers are as follows:
F / 1, f / 1.4, f / 2, f / 2.8, f / 4, f / 5.6, f / 8, f / 11, f / 16, f / 22, f / 32, f / 45, f / 64
Among them, the f / 1 is the largest amount into light the aperture of the serial number, aperture of the values of the denominator, the greater the amount of light into the small. Usually general lens would use the serial jvc gr-d275us battery number of the aperture for f / 2.8 ~ f / 22, the greater the value of the lens aperture and lens diameter and the relative increase its production costs with difficulty.
Series is refers to the adjacent aperture of the values of the gap between the exposure, such as f / 8 with f / 11 between the components level, the f / 2 with f / 2.8 also differs between the level. By analogy, the f / 8 with f / 16 difference between the two level, the f / 1.4 with f / 4 is the difference between the level 3.
In the professional photography circles, sometimes jvc gr-d70u battery called for "archives" series or "case", such as f / 8 with f / 11 difference between the spy, or f / 8 with f / 16 difference between the two case.
In each class (serial number aperture) between, the amount of light behind into serial number is half of the serial number of front. For example say f / 5.6 into the amount of light only f / 4, half the JVC GR-DVF21U Battery f / 16 into light energy is also only f / 11 of the half, the serial number of the back, and into the small amount of light, and the form of the way to series is degressive.
Serial number of the aperture and the amount of light into the relationship
In addition, considering the amount of light besides, aperture size but also with the depth of field. Depth of field is object imaging, the photo (image file) of the extent of the clear. The greater the aperture of the jvc gr-df550us battery depth of field will more shallow (clear the small areas), the smaller the aperture of the depth of field can grow more (clear range is very large).
On the left is large aperture, on the right is the small aperture, can clear indication of the two pictures depth of field markedly different
Large aperture lenses are very suitable for low amount of light in the environment, because it can be in WeiLiang light environment, rip more on-site light, let we can use more rapid shutter to take photos, so that keep filming the camera's stability. But front have mentioned large aperture lenses is not easy to make, must spend more cost can obtain.
Good digital photograph according to the result of chance to film the circumstance such as automatically calculate the size of the aperture and shutter speed usually the faster the greater the aperture, in order to JVC GY-HM100U Battery ensure that there is enough light through, so also is suitable for high speed movement took the objects, such as the act of automobile, of falling water, etc. Aperture is easy to use big fast fast door.
