Taking pictures in rapid succession - General Discussion and Assistance - CHDK Forum

Taking pictures in rapid succession

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Taking pictures in rapid succession
« on: 07 / January / 2011, 12:53:06 »
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Hi, total newbie here.

I have been playing around with different scripts including the Ultra Inervalometer script but have been unsuccessful in taking pictures in rapid succession on my SD750.

When I take a picture it takes one, shows the image on the LCD screen for about 2 seconds then takes another one.  Is there a way to speed this up so that it takes pictures rapidly?

I've adjusted the settings many many times but have been unsuccessful.  Maybe I am using the wrong script to perform this?

I apoligize if this has been covered.  I didn't find it in any of my searches but I could be searching for the wrong things.

Thanks.

BD


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Offline whim

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Re: Taking pictures in rapid succession
« Reply #1 on: 07 / January / 2011, 13:04:29 »
Hi, welcome to the forum !

In most (all ?) Canon P&S camera's, there's a setting in the Canon (shooting mode !) menu called "Review".
Try setting that to "Off"

hope that helps,

wim
« Last Edit: 07 / January / 2011, 13:06:56 by whim »

Re: Taking pictures in rapid succession
« Reply #2 on: 07 / January / 2011, 22:30:55 »
Here is a simple script to shoot photos rapidly. Save it as rapid.bas in your /CHDK/SCRIPTS folder.

Code: [Select]
@title Rapid Photo
while 1
  press "shoot_full"
  release "shoot_full"
wend

end
Canon SD780IS

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Offline fudgey

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Re: Taking pictures in rapid succession
« Reply #3 on: 08 / January / 2011, 04:56:00 »
Also (another non-CHDK Canon feature), if the same focus and exposure are OK, don't release the shutter fully (only half way) between shots. This way it's like continuous mode in terms of speed, but you get to decide when to trigger by fully pressing the shutter.



Re: Taking pictures in rapid succession
« Reply #4 on: 10 / January / 2011, 13:05:52 »
whim,  thought of that after and it sped it up slightly. 

Andrew, tried script and it did speed up it slightly as well.

But it seems the fastest I can take pictures is at 1 second intervals.

There's got to be a way to speed this up further.  I take a lot of pictures of sports action when I'm out riding with friends etc. so it would be nice not to have to time when to press the button.

 

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Offline fudgey

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Re: Taking pictures in rapid succession
« Reply #5 on: 10 / January / 2011, 13:35:56 »
There's got to be a way to speed this up further.  I take a lot of pictures of sports action when I'm out riding with friends etc. so it would be nice not to have to time when to press the button.

The camera needs to focus (unless your camera has native manual focus mode and you use it) and determine exposure (unless your camera has a manual exposure mode and you use it). These tasks require time, as does processing the photo in to a JPEG and saving it on the card.

Even on cameras with no manual controls you can skip focus and autoexposure by using continuous mode (focus&exp only on first shot) or doing what I suggested above (the same).

Maximum continuous shooting rate of Canon P&S cameras is typically a bit slower than two photos per second, your performance depending on SD card write speed, number of photos on the card and some settings (combination of output resolution and digital zoom -- saving in smaller resolution or poorer JPEG quality may be faster but only if image scaling doesn't slow down more than what you gain from write speed).

1 photo per second is actually already getting pretty close to that maximum continuous mode rate, considering the camera will also focus & determine exposure.

Re: Taking pictures in rapid succession
« Reply #6 on: 13 / January / 2011, 12:21:16 »
Yeah thanks for the info fudgey.

I'll just have to suck it up and buy a new camera that is capable of doing what I want.

 

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