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Basic ques about shutter release....

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Offline spark802

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Basic ques about shutter release....
« on: 09 / August / 2012, 20:52:22 »
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Hello, i have downloaded build  3 2012 into my G-12. The version is 1.1.0.0. I am using this system mostly for Astrophotography. I have more or less figured out the intervalomter which is good.

I am going to be tracking on my go-to mount with 256 sec shots. I have set the 256 sec in  the  xtra photo operations.

I am wondering why cant i just push the shutter button to get the 256 sec exp to start?

( i also have it on a 2 sec delay from the scripting)

Any help would be appreciated...and yes i have RTM....

spark
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Offline waterwingz

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Re: Basic ques about shutter release....
« Reply #1 on: 09 / August / 2012, 21:00:12 »
Quote from: spark802 on 09 / August / 2012, 20:52:22
Hello, i have downloaded build  3 2012 into my G-12. The version is 1.1.0.0.
I assume you mean "build Aug 3 2012" ??   Regardless,  its more important to know the Revision number,  which you can get from the "Show Build Info" menu choice in the "Miscellaneous" menu of CHDK.

Quote
I am wondering why cant i just push the shutter button to get the 256 sec exp to start?
( i also have it on a 2 sec delay from the scripting)
This is confusing. 

If you press the shutter button while in CHDK <ALT> mode (where the <ALT> symbol is at the bottom of your screen) then CHDK will run the current script - not take a picture.  You mention having a 2 sec delay from scripting  - what script do you have loaded ?

If you do not have CHDK <ALT> mode active ( i.e. no <ALT> symbol at the bottom of the LCD screen) then the camera should take a 256 sec exposure each time you press the shutter.

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Offline spark802

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Re: Basic ques about shutter release....
« Reply #2 on: 09 / August / 2012, 21:25:46 »
i have shoot. bas
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Offline waterwingz

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Re: Basic ques about shutter release....
« Reply #3 on: 09 / August / 2012, 21:31:15 »
Quote from: spark802 on 09 / August / 2012, 21:25:46
i have shoot. bas
So you have a script loaded that waits 2 seconds and takes a picture with automatic exposure settings.

Probably not what you want to do.

So the trick here is to exit CHDK ( press the <ALT> key again - the one you used to enter <ALT> mode ) and then press the shutter release.   If you have setup things correctly in the CHDK menus,  you should get your 256 second exposure.

Remember,  when you press the shutter while <ALT> mode is active,  CHDK runs the currently selected script.  When you press the shutter button while <ALT> mode is not active, CDHK lets the camera take a picture but with the overrride settings you specified.  Assuming you do not have overrides disabled that is.


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Offline spark802

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Re: Basic ques about shutter release....
« Reply #4 on: 09 / August / 2012, 21:39:03 »
ok thats good info. i will change a couple of things and we will see.

  thank you for your patient replies,



spark
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Offline spark802

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Re: Basic ques about shutter release....
« Reply #5 on: 09 / August / 2012, 21:53:09 »
i have the disable overides set to off
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Offline spark802

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Re: Basic ques about shutter release....
« Reply #6 on: 09 / August / 2012, 22:15:16 »
i think i got it......... i had to set the shutter value factor to "1"   (1 x 256 secs)    :D
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Offline waterwingz

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Re: Basic ques about shutter release....
« Reply #7 on: 09 / August / 2012, 22:21:00 »
very kewl

post some of your pics  here = people love to see things done with CHDK !!!
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Online reyalp

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Re: Basic ques about shutter release....
« Reply #8 on: 09 / August / 2012, 22:29:32 »
Quote from: spark802 on 09 / August / 2012, 22:15:16
i think i got it......... i had to set the shutter value factor to "1"   (1 x 256 secs)    :D
FWIW, for astrophotography, you may get better results taking more, shorter exposures and stacking them.

Also, unless you disable dark frame subtraction, the Canon firmware automatically takes a dark from for exposures longer than about 3 seconds. This is good for image quality, but means each exposure takes 2x as long. You can force dark frame off in CHDK, and do darkframe subtraction later on your PC.
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Offline spark802

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Re: Basic ques about shutter release....
« Reply #9 on: 09 / August / 2012, 22:40:18 »
I have a Rebel T2i that i image with thru my refractor. I link my rebel up with Backyard EOS sftwre and have a laptop in the field with me. I have just started learning the stacking process.


I want my G12 up on top of my scope with a kind of Magiver set-up which i will test this weekend. The G-12 is perfect because its light. Thats what makes CHDK KOOL.

Heres a link to some of my rebel shots... i will post what itake this weekend this coming Mon ot Tues...

[/url]
summer triangle 2 by david moug, on Flickr[/img]
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