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Flash (photography) - Wikipedia. Video demonstration of high speed flash photography. A flash is a device used in photography producing a flash of artificial light (typically 1/1.

K[citation needed] to help illuminate a scene. A major purpose of a flash is to illuminate a dark scene. Other uses are capturing quickly moving objects or changing the quality of light. The War Of The Roses Full Movie Part 1 there. Flash refers either to the flash of light itself or to the electronic flash unit discharging the light.

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Most current flash units are electronic, having evolved from single- use flashbulbs and flammable powders. Modern cameras often activate flash units automatically. Flash units are commonly built directly into a camera. Some cameras allow separate flash units to be mounted via a standardized "accessory mount" bracket (a hot shoe). In professional studio equipment, flashes may be large, standalone units, or studio strobes, powered by special battery packs or connected to mains power. They are either synchronized with the camera using a flash synchronization cable or radio signal, or are light- triggered, meaning that only one flash unit needs to be synchronized with the camera, and in turn triggers the other units, called slaves. Types of flash[edit]Flash- lamp[edit]Studies of magnesium by Bunsen and Roscoe in 1.

The potential application to photography inspired Edward Sonstadt to investigate methods of manufacturing magnesium so that it would burn reliably for this use. He applied for patents in 1. Manchester Magnesium Company with Edward Mellor. With the help of engineer William Mather, who was also a director of the company, they produced flat magnesium ribbon, which was said to burn more consistently and completely so giving better illumination than round wire.

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It also had the benefit of being a simpler and cheaper process than making round wire.[1] Mather was also credited with the invention of a holder for the ribbon, which formed a lamp to burn it in.[2] A variety of magnesium ribbon holders were produced by other manufacturers, such as the Pistol Flashmeter, which incorporated an inscribed ruler that allowed the photographer to use the correct length of ribbon for the exposure they needed. The packaging also implies that the magnesium ribbon was not necessarily broken off before being ignited.

Vintage AHA smokeless flash powder lamp kit, Germany. An alternative to ribbon was flash powder, a mixture of magnesium powder and potassium chlorate, introduced by its German inventors Adolf Miethe and Johannes Gaedicke in 1. A measured amount was put into a pan or trough and ignited by hand, producing a brief brilliant flash of light, along with the smoke and noise that might be expected from such an explosive event. This could be a life- threatening activity, especially if the flash powder was damp.[3] An electrically triggered flash lamp was invented by Joshua Lionel Cowen in 1. His patent describes a device for igniting photographers’ flash powder by using dry cell batteries to heat a wire fuse. Variations and alternatives were touted from time to time and a few found a measure of success, especially for amateur use.

In 1. 90. 5, one French photographer was using intense non- explosive flashes produced by a special mechanized carbon arc lamp to photograph subjects in his studio,[4] but more portable and less expensive devices prevailed. On through the 1. T- shaped flash lamp, holding it aloft, then triggering a brief and (usually) harmless bit of pyrotechnics.

Flashbulbs[edit]. Flashbulbs have ranged in size from the diminutive AG- 1 to the massive No. The AG- 1 flashbulb, introduced in 1. The use of flash powder in an open lamp was replaced by flashbulbs; magnesium filaments were contained in bulbs filled with oxygen gas, and electrically ignited by a contact in the camerashutter.[5] Manufactured flashbulbs were first produced commercially in Germany in 1. Such a bulb could only be used once, and was too hot to handle immediately after use, but the confinement of what would otherwise have amounted to a small explosion was an important advance. A later innovation was the coating of flashbulbs with a plastic film to maintain bulb integrity in the event of the glass shattering during the flash.

A blue plastic film was introduced as an option to match the spectral quality of the flash to daylight- balanced colour film. Subsequently, the magnesium was replaced by zirconium, which produced a brighter flash. Flashbulbs took longer to reach full brightness and burned for longer than electronic flashes. Slower shutter speeds (typically from 1/1.

Cameras with flash sync triggered the flashbulb a fraction of a second before opening the shutter, allowing faster shutter speeds. A flashbulb widely used during the 1.

Press 2. 5, the (about 1 inch (2. Its peak light output was around a million lumens. Other flashbulbs in common use were the M- series, M- 2, M- 3 etc., which had a small ("miniature") metal bayonet base fused to the glass bulb. The largest flashbulb ever produced was the GE Mazda No. World War II.[7]The all- glass PF1 bulb was introduced in 1. Eliminating both the metal base, and the multiple manufacturing steps needed to attach it to the glass bulb, cut the cost substantially compared to the larger M series bulbs.

The design required a fibre ring around the base to hold the contact wires against the side of the glass base. An adapter was available allowing the bulb to fit into flash guns that accepted the bayonet capped bulbs. The PF1 (along with the M2) had a faster ignition time (less delay between shutter contact and peak output), so it could be used with X synch below 1/3. X synch to keep the shutter open long enough for the bulb to ignite and burn. A smaller version, the AG- 1 was introduced in 1. Though it was smaller and had reduced light output, it was cheaper to manufacture and rapidly supplanted the PF1.

Flashcubes, Magicubes and Flipflash[edit]. Flashcube fitted to a Kodak Instamatic camera, showing both unused (left) and used (right) bulbs. Undersides of Flashcube (left) and Magicube (right) cartridges. Flip flash" type cartridge.

In the late 1. 96. Kodak improved their Instamatic camera line by replacing the individual flashbulb technology (used on early Instamatics) with the Flashcube. A flashcube was a single- use module with four flashbulbs mounted at 9.

For use it was mounted on a swivel mechanism atop the camera that also provided an electrical connection to the shutter release and a battery inside the camera. After each exposure, the film advance mechanism also rotated the flashcube 9. This arrangement allowed the user to take four images in rapid succession before inserting a new flashcube. The later Magicube (or X- Cube) retained the four- bulb format, and was superficially similar to the original Flashcube.

However, the Magicube did not require electrical power. Each bulb was set off by a plastic pin in the cube mount that released a cocked spring wire within the cube. This wire struck a primer tube at the base of the bulb, which contained a fulminate, which in turn ignited shredded zirconium foil in the flash. Magicubes could also be fired by inserting a thin object, such as a key or paper clip, into one of the slots in the bottom of the cube. Flashcubes and Magicubes look similar but are not interchangeable. Cameras requiring flashcubes have a round socket and a round hole for the flashcube's pin, while those requiring Magicubes have a round shape with protruding studs and a square socket hole for the Magicube's square pin.

The Magicube socket can also be seen as an X, which accounts for its alternate name, the X- Cube. Other common flashbulb- based devices were the Flashbar and Flipflash which provided about ten flashes from a single unit. The Flipflash name derived from the fact that once half the flashes had been used up, the unit was flipped over and re- inserted to use the remainder. Electronic flash[edit]Electronic flash was developed in the late 1.

The Free Dictionaryhot (hŏt)adj. Having or giving off heat; capable of burning. Being at a high temperature.

Being at or exhibiting a temperature that is higher than normal or desirable: a hot forehead. Causing a burning sensation, as in the mouth; spicy: hot peppers; a hot curry. Charged or energized with electricity: a hot wire. Radioactive or designed to use radioactive materials. Marked by intensity of emotion; ardent or fiery: a hot temper. Having or displaying great enthusiasm; eager: hot for travel.

Informal Arousing intense interest, excitement, or controversy: a hot new book; a hot topic. Informal Marked by excited activity or energy: a hot week on the stock market. Violent; raging: a hot battle. Slanga. Sexually attractive.

Sexually attracted; full of desire: In this week's show, the surgeon is really hot for the new intern. Sexually aroused. Slanga. Recently stolen: a hot car. Wanted by the police: a hot suspect. Close to a successful solution or conclusion: hot on the trail. Informala. Most recent; new or fresh: a hot news item; the hot fashions for fall. Currently very popular or successful: one of the hottest young talents around.

Requiring immediate action or attention: a hot opportunity. Slang Very good or impressive. Often used in the negative: I'm not so hot at math. Slang Funny or absurd: told a hot one about the neighbors' dog. Slanga. Performing with great skill and daring: a hot drummer. Having or characterized by repeated successes: a player who is on a hot streak.

Fast and responsive: a hot sports car. Unusually lucky: hot at craps. Music Of, relating to, or being an emotionally charged style of performance marked by strong rhythms and improvisation: hot jazz. Bold and bright. adv. In a hot manner; hotly. While hot: foods that are best eaten hot.

Informal To cause to increase in intensity or excitement. Often used with up: "His book is an exercise in the fashionable art of instant history, in which every episode is hotted up with an anecdote"(Harper's). Idioms: hot and bothered. Informal In a state of agitated excitement; flustered: all hot and bothered before the opening performance.

Informal Passionate or intense: Interest in the new stock was hot and heavy. Characterized by or engaging in amorous or sexual activity. Slang. 1. Sexually avid; lascivious. Ready and willing; eager.

Informal Angry. make it hot for. Slang To make things uncomfortable or dangerous for: Don't make it hot for yourself by needlessly finding fault. General Physics) having a relatively high temperature. Cookery) causing a burning sensation on the tongue: hot mustard; a hot curry.

Ball Games, other than specified) ball games (of a ball) thrown or struck hard, and so difficult to respond to. General Physics) informal having a dangerously high level of radioactivity: a hot laboratory.

Colours) (of a colour) intense; striking: hot pink. General Physics) informal at a dangerously high electric potential: a hot terminal.

General Physics) physics having an energy level higher than that of the ground state: a hot atom. Jazz) jazzslang arousing great excitement or enthusiasm by inspired improvisation, strong rhythms, etc. Games, other than specified) (in various searching or guessing games) very near the answer or object to be found. Metallurgy) metallurgy (of a process) at a sufficiently high temperature for metal to be in a soft workable state. Australand. NZ (of a price, charge, etc) excessive. Old English hāt; related to Old High German heiz, Old Norse heitr, Gothic heito fever]ˈhotlyadvˈhotnessnhot (hɒt) adj.

Is this mustard hot? Slang. a. sexually aroused; lustful. Informal. very good: not so hot. Informal. currently popular or in demand. Slang. extremely lucky or favorable. Slang. (in sports and games) playing well or winningly; scoring effectively. Slang. funny; absurd: That's a hot one!

Informal. extremely exciting or interesting; sensational: hot news. Informal. (of a vehicle) capable of attaining extremely high speeds.

Slang. a. stolen recently or otherwise illegal and dangerous to possess. Informal. in a state of mind to perform exceedingly well or rapidly. The wire was drawn hot. Slang. intense sexual desire. Idioms: 1. hot and heavy,Informal. Informal. angry; excited; upset.

Middle English ho(o)t, Old English hāt, c. Old Frisian, Old Saxon hēt, Old High German heiz, Old Norse heitr]hot′ly,adv.