|
|
|
|
|
|
|
|
|
Dc тип авто-ирис
| Глоссарий по видеонаблюдению (CCTV) |
|
Dc type auto-iris, английский
Авто-диафрагма линз, где диафрагма контролируется с помощью схем из камеры.
|
|
Диафрагма шкала, русский
F-stop, английский
- Термин, используемый для обозначения скорости линзы. чем меньше f-число, тем большее количество света, проходящего через объектив.
- A term used to indicate the speed of a lens. the smaller the f-number the greater amount of light passes through the lens.
- See f-number fast address a system for setting the address of the camera remotely from the control system.
- A numerical designation that indicates the size of the aperture. it is inversely proportional as a smaller number like f2.8 is a large opening and a large number like f16 is a relatively small opening.
- Is a measure of the aperture opening in the lens defined by dividing the focal length of the lens by the aperture diameter. sequence of f-stops are multiples of the square root of 2 (1.414…): 1, 1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22, etc. even though these numbers are rather cryptic, just remember that each step is double the amount of light. know that and it’s half the battle.
- Number indicating the size of the aperture. it is an inversely proportionate number as in f2.8 is a large opening and f16 is a small opening.
- In photography, a unit on a scale used on camera lenses to indicate a sequence of f-numbers where each stop corresponds to an f-number and with each stop the light that reaches the film is halved. fth (n)
|
|
|
|
|
|
|
