Whether does everybody also have similar case to happen: The picture that takes differs completely with what what think in the head, not be too dark shine too namely, be where to give a fault after all? Want to take a piece of good picture actually, correct exposure is main demand. And want to gain exposure correct video, be about to make the difference that knows all sorts of pattern that measure light. Want to choose pair of mode that measure light to apply neatly only, it is backlighting, tall contrast, crepuscular no matter wait for setting, also can take an exposure easily perfect video.
Measure light on average
Below the environment with cloudy day or not tall contrast, measure light on average to be able to obtain the picture with good exposure.
Measuring light on average is the most commonly used mode that measure light, below major environment, can give correct exposure the result. Below this mode, photograph opportunity undertakes measuring light respectively in the light of all sorts of area in the picture, after the unified result that measure light, compare pair of data-base data, can achieve level of exposure of the first-rate in the environment. Photography develops up to now, film for the most part environment and state, measure light on average to be able to provide quite accurate exposure data, so full automatic film when mode, set pattern beforehand with measuring light on average to be namely. General public presses after shutter, haply can obtain satisfactory photograph, this and take a picture can gain ground, also have quite big concern.
Central key measures light
When main body buy is medium, can collect central key to measure light.
Average person takes a picture always is film leading role is put in midpoint, fall in backlighting and nightly environment so, want those who be aimed at the area central to measure light to make a standard only, again the EV of brightness fine tuning of basis surroundings (exposure is compensated) , can let backlighting or nightly film, gain exposure correct video. In fact, this also is to measure optical technology to undertake measuring light in the light of dinky area hard at the outset, and when expanding divisional exposure, what develop the pattern measuring light that come out, to using central composition of a picture lesser, need more of level of exact exposure of essence of life into rank for the player, central key measures light is the pattern measuring light that uses lesser.
The dot measures light
Below tall comparative environment, if want to behave shadow detail, can use a dot to measure light to affirm light exposure.
The dot measures light is the mode measuring light that high player loves to use. High player always likes to challenge tall contrast, backlighting, morning to faint wait for photography theme, to needs exposure level, also have oneself a view, measure smooth mode not likely on average to accord with the exposure result that high player wants. The dot measures light is to be aimed at dinky area to undertake measuring light, occupy the 1~5% of whole picture only, general with in the center of move repeatedly to the focus, partial chance is planted criterion but with place set move repeatedly to the focus. Use bit of pattern that measure light, can determine respectively the brightness that films area differs in the picture, provide the data that high player place needs. The player is aimed at again film key, latitude, picture presents smooth picture... wait for a state, choose proper exposure value to undertake filming.
Into rank how does the player measure light with the dot?
Measure smooth sketch map on average
Central key measures smooth sketch map
The dot measures smooth sketch map
Enter rank how is the player to use a dot to measure light to make exposure standard? It is normally in the environment of crepuscular or tall contrast, the sensitive component that is negative or digital camera no matter cannot resemble naked eye general, what look to shadow by bright ministry is as clear as day, this is alleged latitude problem. Film when this type is video, into rank the player can measure light to decide light exposure with the dot. Want to decide work gives priority to oversight shadow detail with bright ministry first normally, or give priority to with shadow let bright ministry expose to the sun too. If want both to be able to present detail, be about to decide middle tone first, and bright ministry cannot exceed + 2EV, shadow cannot under - 2EV.
After deciding roughly, use the central dot to the focus to measure light, test the exposure cost of bright ministry, middle tone, dark ministry respectively, after the middle tone exposure that needs certainly is worth, measure spot < also be pair of focuses normally > area of alignment middle tone, use AE Lock to secure numerical value, or it is to use M mode to secure numerical value of aperture, shutter, final composition of a picture films.
Understand more photography knowledge, pay close attention to date of small letter public please: Jun Feng Lai gets stuck
