Difference between revisions of "Flash"
(New page: ==Guide number== ==Recycle time== ==Wireless operation= Category:Photography) |
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==Recycle time== | ==Recycle time== | ||
| + | This is the time the flash need to recharge after a full power flash. It is not comparable between different flashes. A long recycle time can mean that the charging circuit is weak but it can also mean that the flash is very powerful. So the recycle time alone says very little about the flash unit. If the recycle time is long because of a large energy storage capacitor the flash unit will be able to fire many times at a rapid rate at normal power before it needs to be reharged. | ||
| − | ==Wireless operation= | + | ==Battery life== |
| + | Battery life is often listed as the number of full power flashes. It is not comparable between different flashes. A low number can mean that the charging circuit is inefficient and wasteful of emnergy but it can also mean that the flash is very powerful. In normal use the flash will use only as much energy as needed and a flash unit listed with a low number of full power flashes may well have a longer battery life than a flash unit listed with ahigh number of full power flashes. | ||
| + | |||
| + | ==Wireless operation== | ||
| + | Some cameras can transmit information to an external flash unit by flashing the internal camera flash. Some require a separate transmitter mounted on the camera. | ||
[[Category:Photography]] | [[Category:Photography]] | ||
Revision as of 16:46, 16 February 2007
Guide number
Recycle time
This is the time the flash need to recharge after a full power flash. It is not comparable between different flashes. A long recycle time can mean that the charging circuit is weak but it can also mean that the flash is very powerful. So the recycle time alone says very little about the flash unit. If the recycle time is long because of a large energy storage capacitor the flash unit will be able to fire many times at a rapid rate at normal power before it needs to be reharged.
Battery life
Battery life is often listed as the number of full power flashes. It is not comparable between different flashes. A low number can mean that the charging circuit is inefficient and wasteful of emnergy but it can also mean that the flash is very powerful. In normal use the flash will use only as much energy as needed and a flash unit listed with a low number of full power flashes may well have a longer battery life than a flash unit listed with ahigh number of full power flashes.
Wireless operation
Some cameras can transmit information to an external flash unit by flashing the internal camera flash. Some require a separate transmitter mounted on the camera.
