Examples of using F-number in English and their translations into Vietnamese
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Colloquial
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Ecclesiastic
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Computer
How to change the f-number.
Check that the f-number has been set to f/2.2.
When the aperture is widened, the f-number decreases.
If the f-number is increased, both the deer in the background and the details of the poster are clearly captured.
Check that the f-number is changed.
The relationship between aperture opening& the f-number.
F-stop is also referred to as"f-number","f-ratio,""relative aperture," or"focal ratio.".
The A-mode(Aperture Priority mode)is a mode that allows you to set the f-number the way you want.
It should be noted that this would increase the f-number by a factor of two(reducing the amount of light reaching the camera).
Once you have decided on the shutter speed(such as 1/4 second),the camera will automatically determine the ISO speed and f-number.
However, even ifyou use the telephoto end of a standard zoom lens, the f-number at maximum aperture is only f/5.6.
Some users may be concerned about the f-number of the EF16-35mm f/4L IS USM, which has a fixed maximum aperture of f/4.
In general, a lens can beconsidered a“large aperture lens” if its smallest f-number(maximum aperture) is f/2.8 or below.
When the f-number is small, only the eye is in focus while a large part of the skin is blurred, giving a soft impression to the entire image.
I took a test shot using Aperture-Priority AE,and checked the f-number and shutter speed at which the background was properly captured.
However, for photos captured from a close distance, such as portraits, the range of acceptable focusis surprisingly narrow even when the f-number is large.
The aperture setting(f-number) to use is a major decision that professional photographers make when they shoot portraiture.
To control the amount of defocus, four factors are important:"aperture(f-number),""focal length,""focusing distance," and"distance to the background.
The recommended f-number is f/2.2 While the bokeh effect may be slightly reduced, shooting is easier at this f-number as the focusing range becomes a little wider.
We first arrived at a decision on the sensor, after which the planningteam determined the target focal length and f-number before entering the design phase.
And because I was unable to use my tripod on the observation deck, the f-number I used would also have to allow me to shoot by hand at fast shutter speeds without any camera shake.
However, before you throw in the towel, be sure to try out the following 3 tips which we introduce in this article-we promise you won't even have to worry about the f-number or shutter speed.
When you change the f-number on the camera, or when the camera adjusts the f-number, the size of the aperture diaphragm changes accordingly, which also changes the amount of light reaching the image sensor.
Especially when there is a lot of distance between the elements in the frame that are closest to you and those furthest from you,set the f-number to a large number to ensure that all the elements appear in focus.
The lens angle can affect the f-number, the wider the angle the more light can get in, so the illumination spec is usually measured at the widest lens angle(when a variable lens is included).
As the optimal aperture value varies with the distance from the camera to the wire fencing, fine-tune the aperture value after you have fixed the composition,and check the result to determine which f-number to use.
The large f-number(F2.6) projection lens ensures field of depth and provides beautiful projections onto a curved surface as the f-number can be increased with the variable aperture arranged inside the illumination optical system.
In order to achieve a photo with a bokeh effect where the defocused area is so large that the entire area outside the point of focus is intentionally blurred, use the Aperture-priority AE(Av)shooting mode and adjust the f-number to a smaller value.
We recommend using Aperture-priority AE mode and using an f-number slightly on the narrow side(such as f/5.6), which will not only solve the issue of weaker resolution in the image peripheries, but also make any peripheral light fall-off(vignetting) less obvious.
Typically, a light meter will include either digital or analog electronic circuit,which allows the photographer to determine which shutter speed and f-number should be selected for an optimum exposure, given a certain lighting situation and film speed.