Flash synchronisation
Contents
Types of Flash Sync
M Sync
used for (now obsolete) flash bulbs
FP Sync
description
X Sync
description
Types of Flash Sync Connections
PC Sync
description
Hot Shoe
description
Front and Rear Curtains
The use of curtain-style shutters in SLR cameras requires the use of two curtains, referred to as the front curtain and the rear curtain.
Front Curtain Sync
Generally, the flash sync fires at the moment when the front curtain is fully opened, in order to allow light to strike the film plane evenly.
Rear Curtain Sync
Front curtain sync is adequate for most flash-photography. However, when making long exposures while firing a flash, front curtain sync creates an effect where the motion blur appears to leave the subject behind. Sometimes, the photographer would like the effect of motion blur leading up to the subject. Therefore, some higher-end SLRs allow the option to fire the flash sync at the moment just before the rear curtain begins to close.
Links
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