are all external flash wireless??? and does the hotshoe sents any signal out???


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compro_1975

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Apr 24, 2005
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#1
how does the external flash work with the cam???
 

sORe-EyEz

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Jun 28, 2005
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SGee
#2
either by

1) built in flash setting it off slave in d ext flash unit
2) IR / radio trigger on the hotshoe of d cam setting off d ext flash

:)
 

compro_1975

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Apr 24, 2005
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#3
sORe-EyEz said:
either by

1) built in flash setting it off slave in d ext flash unit
2) IR / radio trigger on the hotshoe of d cam setting off d ext flash

:)
oooo tks but could others also provide more info too for me to learn........
 

hwchoy

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Jul 16, 2003
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Tampines, Singapore.
www.hexazona.com
#4
sORe-EyEz said:
either by

1) built in flash setting it off slave in d ext flash unit
2) IR / radio trigger on the hotshoe of d cam setting off d ext flash

:)

actually he asked about "external" flash, which does not necessarily mean off the shoe. I take "external" to mean a flash that is not built into the camera body.

so, let me say that: the camera body does communicate to the flash some parameter information, e.g. how much flash power, what zoom distance, etc. this is assuming that the flash is capable of understanding the camera's commands under the various exposure schemes (e.g. E-TTL, i-TTL, etc).

Now these commands can be transmitted to the external flash via the hotshoe contacts (if the flash is mounted on the shoe). I assume these signals are digital and encoded with data. if the flash is off the shoe and operating wirelessly, then the camera must send these info to the flash either by encoded light pulses through the built-in flash, or via a dedicated wireless transmitter.

not all flash are capable of being wireless or even slave triggered. this depends on the features and spec of the flash itself.
 

sORe-EyEz

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Jun 28, 2005
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#5
ttz all i kno mah, :rolleyes:

d 1st way dun need hotshoe or 4 cams w/o hotshoe - use built in flash.

d 2nd way (got 2 ways like 2a & 2b) like wad i say in brief in my prev post
 

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