QUOTE(weixuan @ Oct 21 2009, 12:36 AM)
light travels at approx. 300000000 m/s, if you put your shutter speed at 1/8000, the flash light can theoretically reach 37500m, which is 37.5KM away.
i more reasonable explanation is that beyond the recommended sync speed, either 1/160s or 1/250s, depending on body used, the camera is unable to communicate with the flash in time for the shutter and the flash to fire in-sync? perhaps an electronics major could answer better
not just electronic major.... you need a physic major, because light, are particals. they travel randomly (Not in straight line) then they get dispearse.i more reasonable explanation is that beyond the recommended sync speed, either 1/160s or 1/250s, depending on body used, the camera is unable to communicate with the flash in time for the shutter and the flash to fire in-sync? perhaps an electronics major could answer better
meaning, when u fire 1/1, it release 1 billion partical, but 50% goes side ways.... the 20% of the last 50% bounced off by surfaces they meet. the 20% of the last 30% never made it pass 10 metre, and the last 10%, well, if u shoot at F11, only 1% made it through.
*thus why we have snoot (zoomed flash) to concerntrate the light partical direction
Added on October 21, 2009, 12:46 amoh, not to mention the partical that trapped by the darkness
and thanks amadeo for
“Light thinks it travels faster than anything but it is wrong. No matter how fast light travels, it finds the darkness has always got there first, and is waiting for it.” - Terry Pratchett
This post has been edited by ieR: Oct 21 2009, 12:46 AM
Oct 21 2009, 12:44 AM
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