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A 590 sensing the Flash operation & shutter curtain

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Offline sparky

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A 590 sensing the Flash operation & shutter curtain
« on: 08 / December / 2008, 04:40:54 »
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Hi Is anybody able to tell me if there is any way of sensing when the flash operates ( is this in the firmware dump ) & also when the first & second curtains of the shutter operate so as to create special effects with second curtain flash trigger or is this only possible on cameras such as the A720 which already has second curtain operation possibly through mechanical means
  Thanks in advance 
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Offline dzsemx

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Re: A 590 sensing the Flash operation & shutter curtain
« Reply #1 on: 08 / December / 2008, 14:16:08 »
yes, it's possible via scripts using the motion detection fuction
see an example here:
UBASIC/Scripts:Lightning script -- Fudgey - CHDK Wiki
(copy-paste to a text file and place it in the chdk\scripts folder and rename it to have ".bas" extension)
try to search on the forum for other ones if this doesn't work
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Offline sparky

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Re: A 590 sensing the Flash operation & shutter curtain
« Reply #2 on: 09 / December / 2008, 06:35:54 »
dzsemx
Thanks for your suggestion .I will give it a try over the next couple of days & let you know
cheers
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Offline dzsemx

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Re: A 590 sensing the Flash operation & shutter curtain
« Reply #3 on: 09 / December / 2008, 08:09:46 »
i forgot to tell that the camera may miss the light of the flash if scene is well lit. generally it doesn't miss in lower light.
btw i didn't deeply understand your question, only i tried to guess what you may need

it would be nice to know what camera you got :D

if you need rear curtain flash on a camera without such option maybe you got luck,
because evawr added rear curtain flash sync for a570 & sx100is a few weeks ago
« Last Edit: 10 / December / 2008, 06:12:35 by dzsemx »
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Offline ewavr

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Re: A 590 sensing the Flash operation & shutter curtain
« Reply #4 on: 09 / December / 2008, 08:48:19 »
@ sparky:
Try this ubasic script with flash and 1-2 sec shutter speed:
Code: [Select]
set_prop 64 1
shoot
end

If flash fires on rear curtain, this support will be added to CHDK.
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