Bracketing in continous mode - tweak? - General Help and Assistance on using CHDK stable releases - CHDK Forum
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Bracketing in continous mode - tweak?

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Offline guiyoforward

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Bracketing in continous mode - tweak?
« on: 01 / July / 2008, 18:03:33 »
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hi everyone, I have an sd870is, and I downloaded the all best release because I wanted to use exposure bracketing for HDR images. I'm a newbie, but as far as I understood, I set the Tv range and then set the camera to continuous mode, then press the shutter and holding, and voila!
My problem is that I tend to shake the camera (I have a small flexible tripod) when holding the shutter, so my pics move a bit. Is it possible to press the shutter once, release it, and then after, say, a second, get the three pictures in a row? That would really help me.

thanks
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Offline fe50

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Re: Bracketing in continous mode - tweak?
« Reply #1 on: 01 / July / 2008, 18:20:45 »
Hi guiyoforward,

you can use the self timer - mode (in Canon menu), set the delay to 1s and the shot count (1 to 10 shots).

I use the bracketing for my HDRs the most time with 1 2/3 or 2 Ev,  Bracketing type +/- and make 3 shots with the self timer (available in manual mode).Normally i use the camera in manual mode with disabled the "Clear Bracket Values on Start" setting in the "Bracketing in Continuos mode" menu; so i can take "normal" shoots in "single shoot" mode and in bad light conditions i switch to "Custom timer" and make the 3 shots. Back on PC i decide whether the +/- 0Ev pic is ok or if i make a HDR with 2 or 3 shots...

So with the self timer you can take up to 10 shoots, if you want more you can use a script...
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Offline guiyoforward

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Re: Bracketing in continous mode - tweak?
« Reply #2 on: 01 / July / 2008, 19:21:59 »
great, thanks! will try that.
Ev and Tv... I get confused. Foir HDR you want in general the same aperture so that the depth of field doesn't change, only the light through exposure, right?
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Offline guiyoforward

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Re: Bracketing in continous mode - tweak?
« Reply #3 on: 01 / July / 2008, 19:26:55 »
oops, sorry - confused again. I am in manual mode. pressing the dial down, I get four options:
-single shot
-continuous
-10s self timer
-2 sec self timer
-Custom timer

where do you set the shot count?

thanks again
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Offline fe50

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Re: Bracketing in continous mode - tweak?
« Reply #4 on: 01 / July / 2008, 20:12:48 »
Quote
where do you set the shot count?
Press the MENU button (outside Alt-mode), it's in the first Canon menu, the 6th entry, with SET/FUNC you'll get a sub menu with the delay / shots - settings...

Quote
Ev and Tv... I get confused. Foir HDR you want in general the same aperture so that the depth of field doesn't change, only the light through exposure, right?
Hmm, the Ixus models have no iris, they have only a ND filter (not controllable on the SD870 at the moment), so this isn't so easy...

* EDIT:
On the SD870 we only have Tv Bracketing, description from the wikia, CHDK firmware usage / AllBest:

Exposure Bracketing by adjusting the shutter speed (Tv Timing value). (Aperture and ISO remain constant) Sets the exposure shift by an EV (exposure value) in the range 1/3EV to 2EV

We have no Av Bracketing ("Exposure Bracketing by adjusting the Aperture (f/stop). (shutter speed and ISO remain constant).") on SD870...

« Last Edit: 01 / July / 2008, 20:20:45 by fe50 »
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