Types of flasher
The winged flash fin flasher includes a direct hot fin and a side hot fin. (1) the keys of the direct thermal fin flasher are composed of fins, thermal expansion strips, contacts, etc. When working, the elastic fin bends under the pulling force of the thermal expansion strip (the metal strip with large thermal expansion coefficient), and the contact is closed.
Automobile flasher mainly plays a prompt role in automobile driving, which is mainly divided into capacitive flasher, vane flasher and side hot vane flasher. Different types of flasher have their own characteristics, according to different models to choose different flasher.
The types of electronic flasher are: electronic flasher with contact; electronic flasher without contact; electronic flasher with all transistor.
There are three common types of flash relays in automobiles: capacitive flasher, vane flasher, electronic flasher, capacitive flasher structure: it consists of a relay and a capacitor.
Types of electronic flashing lights
Large flash: large flash is generally used in photo studios, studios, photography studios and other occasions. The characteristic of this kind of flash lamp is that the output power is very large, and the flash index is not used to calculate the flash amount. Instead, it is replaced by the W 400w/s s (watts per second). Generally speaking, the flash index is about 56.
External flash, external flash is generally located at the top of the camera body, some high-end external flash also provides a variety of advanced functions. Handle flash, handle flash is often used in photo studio, studio, wedding photography studio and other professional places.
The A-TTL flash (300TL and EZ series flash only) emits a short pre-flash during the metering phase (that is, when the shutter release button is half-pressed), which is recorded by an external sensor in front of the flash to determine the appropriate aperture to ensure adequate depth of field, especially at short distances.
At present, there are many types and models of electronic flash, but there are no more than three types: pure manual, automatic dimming and special flash.
D equipped with 580EXII, 430EXII, 320EX, 270EXII, 270EX and other flash lights, the English name of the flash is FlashLight. Flash is also one of the ways to increase exposure, especially in dark places, flash helps to make the scene brighter. The full name in Chinese is electronic flash, also known as high-speed flash.
Because the pulse trigger capacitor C3 (that is, the two ends of K2) often has a high voltage of more than 150 volts, it will be shocked when touching the flash plug or hot boot plug, which is called high voltage trigger.
What are the types of flash for digital cameras?
There are several types of camera flash: built-in flash: general 135SLR cameras, APS cameras, stupid cameras are equipped with built-in flash, depending on the camera GN varies, the GN of 135SLR is about 12.
Special flash can only be used in TTL photometric cameras. As long as you look at the “hot boots” on the camera flash socket, if there is more than one contact above, it is this kind of camera, you can use it, and it is better to choose this kind of flash. For cameras with only one contact or only a flash Jack, you can only use a general-purpose one.
Hot boots flash works well because they don’t always have to be connected directly to the camera. The more advanced flash has a wireless feature that allows your camera to turn on them without being connected to a DSLR, but to communicate with each other using infrared or radio frequencies.
Built-in flash, the use of built-in flash will cause a lot of camera power consumption, and the built-in flash does not support a variety of advanced functions of the flash. External flash, external flash is generally located at the top of the camera body, some high-end external flash also provides a variety of advanced functions.
TTL systems vary from manufacturer to manufacturer. There are the following common types: A-TTL (Advanced TTL) Canon’s first step in improving its flash exposure design was to create A-TTL, also known as’ advanced transmission lens’ flash photometry, which was widely used in early EOS film cameras.
The supplementary light or flash of the mobile phone or camera on the market is a necessary part of the device, and it is the most important part for users who like to take pictures.
