Guide: With the improvement of living standards, people's lives are becoming more and more electrical, which is attributed to electricity. The things introduced in Xiaobian today are also related to electricity. You must have heard of led lights and flashlights. Now there is a problem, that is, many people do not know which LED lamp and flash are good and which is better for led fill light and xenon flash. The led fill light and the flash have a common effect, which is to make the scene brighter in a dim environment. But in fact, there is still a difference between them. Let's take a look at the LED lights and flashes.
Led light
Led light and flash which is better
Led light and flash which is good, the flash is a xenon lamp, instantaneous high voltage, especially bright. The led light is white, it is a flashlight, lighting, it can indeed fill the light, but with the flash is two different concepts. Led lights and flashes which is good, led lights are not illuminated by the internal electronic jump of the atom, but by adding a voltage to the ends of the PN junction of the led, so that the PN junction itself forms an energy level, then the electrons in this energy The level jumps and produces photons to illuminate. Led lamp and flash which is good, the service life of qualified LED lamp under rated power should reach about 100,000 hours. If the mobile phone is designed to use the LED drive current beyond the rated current, the LED life will be greatly reduced to thousands or even hundreds of hours.
Led fill light and Xenon flash which is better
Xenon flash is characterized by a high index, usually up to 50 GN, such as Canon's 580EX flash, index is 58GN, suitable for modeling.
The idea of ​​led fill light is not strict. It should be called a lighting lamp. It refers to a constantly lit lamp or a fixed-index lamp. The feature is WYSIWYG, such as the stage lights.
Led fill light
The difference between the two is that the Xenon flash can automatically calculate how many flash outputs are needed to meet the normal exposure through ttl. When shooting, such as low drops or high-speed photography, you don't need a shutter that is too fast, just flash at that moment. You can freeze. You can also use strobo to record motion trajectories, such as 1 second exposure, stroboscopic light, and you can freeze multiple frames in this second. In addition, when shooting special effects, such as the background is completely black, you can use the M file, manually set the high-speed shutter, small aperture, lower the background, and only let the flash side backlight, so that you can shoot the background all black during the day. effect. In portraits and sketches, you need to use multiple lights, such as clips, butterfly lights, flashes to make the surface of the object more intense, or make the skin whiter, through multiple angles of light, splitting light, etc. The object is more solid, contoured and so on. The final part of a good photography is lighting, so it is very necessary to have more than 2 flashes (can be off-camera).
Do you know which LED light and Xenon flash are good?
What is a led flash
Led flash from the earliest magnesium powder flash to the current electronic flash, magnesium powder I am too lazy to mention. The modern flashlights are all electronic flashes. The principle of illumination is to oscillate and boost the input current to obtain an alternating voltage greater than 300V. After half-wave rectification by the diode, it becomes a DC voltage, and the capacitor is charged and stored. The voltage, through the triggering electric level of the xenon flash tube, ionizes and turns on the nitrogen gas, and the electric energy on the capacitor is instantaneously converted into light energy by the helium gas to complete a flash. The speed of the flash is very fast, from the beginning of the light to the half-life is generally only a thousandth of a second, the intensity is very large.
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