Flash development history
2015/12/15 view:
48 years after the birth of photography (1887) only appeared flash photography, its development process roughly as follows:
Various types of flash Atlas
Various types of flash Atlas (8)
1. magnesium flash unit (1887 - 1930). Ignite a mixture of magnesium and potassium chlorate to send a strong white light, this approach lasted nearly half a century.
2. a flash (flash bulb). 1929 German Aust Mayer (J · Ostermeyer) invention.
3. The electronic flash. 1931 invention, the 1939 sale, which uses the gas discharge principle. It features high-speed, economical, convenient, mainly divided into three generations of products:
The first generation of products in use between 1931 and 1939, which uses a mechanical oscillator, prone to failure.
The second generation product in the mid-1960s to use, it uses a transistor oscillator circuit. Such as seagulls 107B, 108 type
Third-generation products into the market in 1972, which is characterized by:
(1) integrated circuits and silicon transistors blue photosensitive control circuit can automatically winking time according to the shooting distance and reflective of the strength of the control (from 1 / 50,000 to 1/120 seconds)
(2) The formula to bypass the parallel-controlled electronic flash, to save energy, save energy, shorten the flash gap, to create the conditions for the strobe.
(3) "Hot Shoe" and other automatic contacts, control speed to "X" position.
(4) Color Temperature 5500K, shooting Suitable for daylight color film.
Various types of flash Atlas
Various types of flash Atlas (8)
1. magnesium flash unit (1887 - 1930). Ignite a mixture of magnesium and potassium chlorate to send a strong white light, this approach lasted nearly half a century.
2. a flash (flash bulb). 1929 German Aust Mayer (J · Ostermeyer) invention.
3. The electronic flash. 1931 invention, the 1939 sale, which uses the gas discharge principle. It features high-speed, economical, convenient, mainly divided into three generations of products:
The first generation of products in use between 1931 and 1939, which uses a mechanical oscillator, prone to failure.
The second generation product in the mid-1960s to use, it uses a transistor oscillator circuit. Such as seagulls 107B, 108 type
Third-generation products into the market in 1972, which is characterized by:
(1) integrated circuits and silicon transistors blue photosensitive control circuit can automatically winking time according to the shooting distance and reflective of the strength of the control (from 1 / 50,000 to 1/120 seconds)
(2) The formula to bypass the parallel-controlled electronic flash, to save energy, save energy, shorten the flash gap, to create the conditions for the strobe.
(3) "Hot Shoe" and other automatic contacts, control speed to "X" position.
(4) Color Temperature 5500K, shooting Suitable for daylight color film.
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