Take a picture, spoken parts in an opera the process that is an exposure, inside proper time, the radial action of will certain amount is in sensitive component (film, sensor) the work that attend, made exposure.
Because of this exposure spoken parts in an opera is two big factors are being controlled actually, the time of exposure, and the quantity of unit time exposure, and dominating this both index is shutter and aperture. Since be exposure triangle, that still must involve another element, the sensitive component feeling to the light ability, it is speed, namely ISO.
Exposure triangle is controlling exposure, they 3 person between interplay also is restricted each other, among them tall, have to reduce two when remain or a balance that will achieve exposure.
We say shutter first, the time that alleged shutter says to the screen sign that straight Bai Yi is nodded even if the ray stops between smooth component of camera lens sympathize is opened (because distinct watch for an opportunity uses different act shop flag,design, development discussion is not done here) , open when screen sign, the light delivers sensor to go up through camera lens, sensor experiences the light, shut till screen sign, the time that sensor accepts the light is shutter, following plan institute show:
Since be time, that can record screen sign to open the before picture inside this period of time, the content that arrives to the record because of the accident of this time of exposure is having conclusive effect.
Institute of following two pieces of plans are shown, if shutter is opened time is longer, so open screen sign to shut the video metropolis when the apple inside this period of time falls to be recorded to be on sensitive component from screen sign.
Image Via Sheldon Evans
And shutter of use high speed when, open from screen sign shut have very short instant action only, in look right now the apple that is whereabouts is opposite for also be illicit, because of this movement by caky.
Image Via Sheldon Evans
Want to become the word of originality for appearance content through shutter when us so, if want to freeze the object that high speed moves, must want to use high speed shutter, say to film for example the person in motion, the car in advancing, the puppy in running is waited a moment, but the contrail that if want to pat an object,moves, can try to use slow shutter, resemble filming of optical track and so on.
Below for aperture, following plan institute show aperture, control bulk of aperture of camera lens starting a hole through the lamina inside camera lens namely, and this aperture, it is aperture:
The expression that says aperture above all in formal F/xx, xx represents aperture bulk, and Xx is the position in denominator, accordingly aperture is jumped over on numerical value small, aperture is bigger, say F/2 is about to be more than F/5.6 for example.
We are OK in above graph easily see, aperture is bigger, the aperture of starting a hole of camera lens is bigger, the beam that transmits sensor to go up through camera lens inside unit time so to speak is more.
That is to say, when exposure effect is consistent, increase time of exposure (the time of entered light lengthens) , need stop down (the unitage decrescent that enters the light) will achieve exposure to balance, vice versa.
But to aperture, measure into light besides control how many besides, it still can control another serious content, it is depth of field.
Should use same raise camera lens same table camera, the camera distance to main body, when main body agrees to the distance of setting, open big aperture, depth of field can become shallow, setting can be changed by empty, stop down, what depth of field can change is broad, connect setting to also can become clear, following two plans institute show:
Image Via Sheldon Evans
Image Via Sheldon Evans
While accordingly we are considering to know smooth amount, also want to consider the aperture impact to depth of field. When us need films the picture of more extensive depth of field when, inevitable want stop down, connect smooth quantity to decrease at that time, and if want to achieve exposure to must want evenly,increase shutter time, same, if we need to film shallow depth of field when, open big aperture with respect to need, connect smooth quantity to increase at that time, must reduce shutter time to balance exposure with high speed shutter.
The 3rd element of exposure is speed, speed is very magical, when having, we need to film weak luminous environment, but must catch a movement to want to use high speed shutter so again, and aperture reachs the limit again, have to raise speed to balance exposure at that time.
Well-known speed is not taller better, we know the addition as speed, the ability of inductive light also can increase, because capability is stronger and stronger,also be, too too active, can appear not carefully so dots of more a confusion of voices, speed is accordingly higher, point of a confusion of voices is stronger. This is a hard injury simply in inchoate digital camera, but the development as science and technology, the tall feeling of a lot of camera can gain very good control, the digital camera that now is the much on the market still can be behaved below 3200 speed good, what camera of some high end can behave even is better.
Photo By Clem Onojeghuo On Unsplash
Opposite for, picture is bigger, watch for a chance is better also to the control of tall feeling, this also is full frame to C or a 43 advantage, because resemble spending in same solution,this is below, the density resembling element of the sensitive component of bigger picture wants at lesser picture relatively low, can let sensor make a manufacturer there are more spaces to control tall feeling in electronic circuitry respect.
But also be to build the foundation in photograph correspondence to go up quite, also want to take the sensor that rolls out at the same time to compare at least, if be being compared in disorder otherwise, before perhaps the tall feeling of 1 inch of present picture wants to compare 10 years complete many what feel high ambitious.
After all science and technology is in all the time progress.
