Instant flash output decision
For starters, canvas prints australia flashing lights, flashing lights determine how the output should be the beginning of the most perplexing questions. Here to explain it in (A) Sunny. (B) Cloudy / Indoor and (C) shimmer, these common conditions, contribute to control how to think. Also, please review the preceding GN combat, subject underexposed fix force concept, and so aperture tube body.
First, we have a few reasonable assumptions:
The conceptual basis of ISO: sunny days, we use ISO 100, canvas prints cloudy or indoors, the camera ISO set at ISO 400, and the dim light environment, ISO set at ISO 1600. ISO increase. Also makes flash of GN increase. In simple terms, ISO 400 when, GN will increase 2 times; and when ISO 1600, GN will increase four times. Therefore, the aforementioned flash output aperture real table at all levels, will be presented in figure 1.
Big flash of GN contribute about 32 (ISO100.M): As mentioned earlier, whether SB-910,580EXII, 600EX, V850 and other small flashing lights, flashing lights at the 35mm focal length, GN are between 34-36, with the objective environment in real time, GN = 32 conservative and reasonable indexes.
Lamp position is approximately 2 meters: This is a reasonable distance when lighting.
In the main flash light.
Several conditions contribute reckoning
Under these factual conditions, we obtain the results of Figure 1, please pay attention to the middle of the Sunny # 1.
On practical point of view, sunny day, we would often stop on the F16, F11, canvas prints special offer flash output is usually placed M (1/1), all-out or M (1/2), the value of this table is clearly consistent with experience.
Cloudy days, we often increase the aperture shooting, the aperture on F5.6, F4, flash output is usually placed M (1/8) or M (1/16), which is consistent with the actual situation. But we will be more emphasis on soft cloudy day, if the device will add soft impairment brightness levels, and we improve the basic ISO 400 will increase to two flash output. Soft with ISO means improvement in the flash of GN will cancel each other out.
Therefore, they are returned to the aperture of F5.6, F4, flash output is usually placed M (1/8), all-out or M (1/16) of cases. When glimmer, a similar situation, dim light environment will use reflection, transmission means more subtle, light impairment grade 4 is common. Nonetheless, may also ISO set at ISO 1600, also in the flash of GN will cancel out each other.
▲ This is a common situation at all levels of output aperture combat table, in fact, just remember three basic values ??Sunny # 1, the adjustment knows principle. I decided to flash output really fast ah!
Therefore, if the use of large aperture shooting in low-light environments, for example, we will put aperture F2.8, F2, flash output may be M (1/32) or M (1/64). This value, if the brigade shot in dim light environment, but also in line with actual combat experience.
Face a different environment adjustment
Thus, it seems that even does not have a meter! However, because of differences in the shooting environment, the value of Figure 1 sometimes one to two errors in Figure 1 is the ideal value of combined experience reckoning.
At this point how quickly adjust? This problem is back in front of us to talk, to make the body more buoyant, you can increase the output of a flash or increase the camera aperture level.
Make darker subject, you can reduce or decrease the flash output of a camera aperture level.
Let the body to maintain the existing brightness, flash output to keep the aperture reciprocity, for example, to increase the output levels, the aperture will shrink levels; reducing output levels, the aperture is necessary in order to increase levels.
One second metering concept of intuition
Because ‘the camera tube scene’, and the camera metering Matrix metering is carried out after the metering valve adjustment incorporated by reference to Figure 1, is not difficult. I do not normally leave Sunny # 1 in Figure 1 to Sunny # 3 range. In addition, you do not forget the distant lamp is also a bit of variation due to the lamp position close to the body to make the body lighter. In the face of adjustment in different environments, and sometimes a little bit to adjust lights, flashing lights will make the operation more in line with the reckoning of Figure 1.
This needs to be done using AD180 shooting situations, to contribute to the relationship between AD180 with small flashing lights but also how to convert? Actually very simple, at the same level of output. AD180 than the SB-910 or 580EXII big two.
So, if the SB-910 / 580EXII be sacrificed four soft lights, for it is about AD180 impairment level 2. When using the SB-910 / 580EXII need F1.4 aperture, for AD180 to about F2.8.
With flashing lights to indicate output aperture settings
Studio, studio customary notation
In the studio, when we recorded light cloth map, flash setting, the flash output is not set to record, but to mark the iris, the representative of the then flash settings.
Because this is the most intuitive, the most businesslike, but also the easiest to calculate the number of stages, the conversion approach. If changed GN, output or the wattage, but not easy to understand.
In Figure 1, for example, this light distribution diagram representing at least several meanings:
A, B two lamps were to do the principal light and the fill light, and right and left sides of the body has a light ratio of 2: 1. You know how light ratio of 2: 1 at? Because the B lamp marked F5.6, while the A lamp marked F8, which already represents, B lamp light output is only half of A, which is the difference between a meaning.
The camera aperture to F8, and backlight labeled F16, which means that C lamp bright background may be overexposed allow background paper, the whole lit no details.
Backlight light brighter than the two main light.
Such a recording mode is most clearly expressed!
Nevertheless, the studio lights confirm how effortless?
However, studio fix in force when the aperture value, after all, is holding a delicate meter, a lamp test, the aperture setting and light output according to the desired position to make a decision.
In Figure 1, if we take the same three small flash.
Actually, the previous concept, we shall prevail as long as the aperture F8 fix a lamp output of A, B as well as other auxiliary lamp light scene C, respectively, B is minus one lamp output, C plus two lamp output is possible of! This may likewise fix A. B two lighter than light.
When more stringent, if often shooting indoors, often play more fun, but also want to quickly set out the main light output, buy a light meter is one of the options can be considered.
When we have a green flash when the application side, we are not really in accordance with its marked GN index, to calculate the aperture, in each case, we might use.
▲ Our recording studio set value to other people refers to when you do not record GN size set, but converted to the aperture value, this is a very important concept!
Just set a lamp. Other lamps can be estimated, that light ratio. Whether indoors, outdoors, methods are the same ones!
The best practice is to full light output, holding a light meter actually measure what it is 1 meter, 2 meters at the aperture value of the camera to be used, this application is a true value. The borrowed by such values, you can do a previous section, in all situations, ‘the actual levels of output aperture table’ may make a cheery, cloudy, shimmer when preset reference value. Next, we can set a reference ray impairment when: a wreck sunny, sunny day two when the reference value. Plus the conversion and output aperture concept, but also soon be able to take action on the actual output of the flash!
▲ Shooting stage with the iris set to replace the GN is the most practical way to go. In this photo in the studio with three flashing lights simulate outdoor seaside shot when set to do is tantamount to stop the distribution of light than the record. There are two flashing lights in front of the same, the highest light F5.6, auxiliary lamp F2.8, side backlight F8, backlight lamp used to simulate the sun when tested separately.