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Chapter Eight - The Flash

How is the flash ignited?

Named X Sync because: from the flash at the moment the shutter is fully open. This is called the basics of electronic flash that uses instantaneous discharge valves. Many older cameras offered the option of flash synchronization. It ignites the flash during a specified period before the shutter opens. This helps the bulbs gather full intensity at the crucial moment. Film-shutter cameras have an M-sync mechanism for normal flash bulbs such as the AG3B. Some models with a shutter in the focal plane also have an M-sync, but most of these models with a shutter in the focal plane contain 2.

Most cameras have contacts located within the shutter (Fig. 34). On most modern cameras, these contacts ignite

The long-disabled Fp synchronizer needed for the FP bulbs

What are the connections used for flash?

Two basic methods of connection are used: there is a contact in the auxiliary shoe (the hot shoe) that connects directly to a shoe-mounted flash; And the other form
Using a flash gun: - A flash bulb connected to the socket and by electronic means to socket B. x - Using an electronic flash means using an appropriate shutter speed so that the flash fires only when the shutter is fully open (C). If a faster speed is used, the shutter in the focal plane will only expose part of the image to the light, and an improperly synchronized paper shutter will underexpose, or not produce any image.

It is a 3 mm coaxial into which the connecting wire from the flash is inserted. This also helps to use primer wires to ignite remote flashes. When more than one flash is used, the best way to ignite is to provide all but one of these flashes with slave electronic cells. The dependent cell detects the light emanating from the one flash that is connected directly, and it also triggers the other flash that is connected with it immediately.
Many hot shoes have additional contacts for dedicated flashes (Fig. 35). These set the correct shutter speed and give an indication of flash readiness in the viewfinder. Some are also connected to the camera's exposure controller for fully automatic flash control.

What are flash bulbs?

Flash lamps have long been considered a useful and convenient source of high-intensity lighting (Fig. 36). The unit that is ignited can be integrated with a very simple circuit assembly that is light in weight and inexpensive. In fact, the lamp can be ignited directly by One of the disadvantages of the lamps is the 1.5 volt battery, which is large in size in terms of its quantity, and that it works for one time, so that it must be disposed of after use. It also increases the cost of each exposure and includes a relatively long ignition time, which prevents it from being used in works that require high speed.

Flash Cubes are considered a compromise as they include four bulbs that are installed individually with their reflectors in a small square holder that does not require a gun and remains separate to light it. The cubes are more expensive than buying four separate bulbs, but they are compact and convenient to use. The cube automatically rotates towards a new bulb when the old one burns out as soon as the film is presented. As for the other devices, a number of lamps installed within a rod are used. Each bulb is installed in front of a reflective material, and by means of the circuit, a new bulb is ignited for each new image.

What is the difference between the flash cube and the cube called Magi cube? The flash cube is ignited by a low voltage battery like a bulb
normal flash. While the Maggi Cube is ignited by a mechanical mechanism that releases a spark plug igniter located in the bulb, and these two cubes are not interchangeable, some modern cameras that use flash rod ignition use a piezoelectric crystal to generate the ignition spark, with a heat-sensitive chemical path to guide
current to each bulb in turn.