SX40 help - page 2 - General Discussion and Assistance - CHDK Forum
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SX40 help

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Offline Anoop Kumar

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Re: SX40 help
« Reply #10 on: 29 / January / 2012, 23:53:02 »
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With CHDK I am able to shoot in .DNG and executed HDR script (edited default script to get 5 shots at different exposure)  :D.

But still I am not able to get exposure longer than 15 second and ISO override. where I am doing wrong??

Mode M (Manual)
1: Disable Override  [Off]
2: ISO [60]
3: exposure [50 sec]

Am I doing correct??

Also sup.Fine JPEG is not so fine.
 2.3 mb from default camera setting only producing 3-4 mb sup.fine from CHDK.

Version: 1.00I
Please comment !!!
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Offline philmoz

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Re: SX40 help
« Reply #11 on: 30 / January / 2012, 03:40:45 »
Quote from: Anoop Kumar on 29 / January / 2012, 23:53:02
But still I am not able to get exposure longer than 15 second and ISO override. where I am doing wrong??

Mode M (Manual)
1: Disable Override  [Off]
2: ISO [60]
3: exposure [50 sec]

Did you set the 'Value Factor' for the shutter speed and ISO overrides?
If 'Value Factor' under each setting is 'Off' the override is disabled.

Quote
Also sup.Fine JPEG is not so fine.
 2.3 mb from default camera setting only producing 3-4 mb sup.fine from CHDK.
omment !!!

Super fine is a waste of disk space, you will not be able to visually tell the difference from an equivalent image at the 'Fine' setting.

Do you really think Canon would have disabled the mode if it produced substantially better images?

(We only enable it because people complain if it's not there.)

Phil.
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CHDK ports:
  sx30is (1.00c, 1.00h, 1.00l, 1.00n & 1.00p)
  g12 (1.00c, 1.00e, 1.00f & 1.00g)
  sx130is (1.01d & 1.01f)
  ixus310hs (1.00a & 1.01a)
  sx40hs (1.00d, 1.00g & 1.00i)
  g1x (1.00e, 1.00f & 1.00g)
  g5x (1.00c, 1.01a, 1.01b)
  g7x2 (1.01a, 1.01b, 1.10b)
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Offline Anoop Kumar

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Re: SX40 help
« Reply #12 on: 30 / January / 2012, 13:10:39 »
Quote from: philmoz on 30 / January / 2012, 03:40:45
Quote
thanks Phil.

My bad ... Didn't referred CHDK manual.  Well just clicked 80 sec exposure with F16 aperture  8) 8)


Somewhere I read that super fine jpeg is is only nearly lossless about 10-20% compression ratio. thats why asked because in that case it should produce 8-9 mb file.

I think I am getting lots of chromatic noise in .DNG file, Is that normal :-X
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Offline philmoz

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Re: SX40 help
« Reply #13 on: 30 / January / 2012, 14:02:12 »
Quote from: Anoop Kumar on 30 / January / 2012, 13:10:39
I think I am getting lots of chromatic noise in .DNG file, Is that normal :-X

Compared to the out of camera jpeg, probably - CHDK saves RAW/DNG files before any noise reduction is done by the camera. This means you can apply as much or as little noise reduction as you want, using whatever software works best for you.

The processing done in the camera is actually very good on this model, so you may need a bit of effort to get comparable results - I find Lightroom does a decent job.

Phil.
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CHDK ports:
  sx30is (1.00c, 1.00h, 1.00l, 1.00n & 1.00p)
  g12 (1.00c, 1.00e, 1.00f & 1.00g)
  sx130is (1.01d & 1.01f)
  ixus310hs (1.00a & 1.01a)
  sx40hs (1.00d, 1.00g & 1.00i)
  g1x (1.00e, 1.00f & 1.00g)
  g5x (1.00c, 1.01a, 1.01b)
  g7x2 (1.01a, 1.01b, 1.10b)
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Offline Anoop Kumar

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Re: SX40 help
« Reply #14 on: 31 / January / 2012, 00:19:34 »
Will try to shoot with correct setting..
yup, Lightroom would be a good for post processing.
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Offline fe50

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Re: SX40 help
« Reply #15 on: 31 / January / 2012, 00:59:08 »
Quote from: Anoop Kumar on 31 / January / 2012, 00:19:34
yup, Lightroom would be a good for post processing.
You may also have a look to RawTherapee: free, open source, available for Windows, Mac OS X and Linux platforms...

* http://rawtherapee.com/
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Offline Anoop Kumar

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Re: SX40 help
« Reply #16 on: 14 / February / 2012, 13:35:47 »
Need help with building remote cable for SX40 hs.
I successfully assembled cable with single CR2032 3V battery and tested with a led light. + and - ports are also at right place but remote is not working.
Main Menu > Miscellaneous Stuff > Remote Parameters > Enable Remote. and tried to use my remote not worked .
tried to run with script but still doesn't work.

can you please suggest me any other option. can I use two LR03 aaa 1.5v battery?
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Offline waterwingz

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Re: SX40 help
« Reply #17 on: 14 / February / 2012, 15:02:26 »
Quote from: Anoop Kumar on 14 / February / 2012, 13:35:47
can you please suggest me any other option. can I use two LR03 aaa 1.5v battery?
You can test that your camera is working correctly by connecting it to your PC using a standard USB cable. Plugging and unplugging the cable can simulate pressing the switch on a USB remote. 

If that works but your circuit does not then you might try using three LR03 AAA batteries to get the voltage up to 4.5V
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Offline Anoop Kumar

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Re: SX40 help
« Reply #18 on: 15 / February / 2012, 11:20:15 »
Quote from: waterwingz on 14 / February / 2012, 15:02:26
You can test that your camera is working correctly by connecting it to your PC using a standard USB cable. Plugging and unplugging the cable can simulate pressing the switch on a USB remote. 

If that works but your circuit does not then you might try using three LR03 AAA batteries to get the voltage up to 4.5V

thank werewingz..
wow... remote usb connected to laptop is working..   :D I will try now my assembly with  three LR03 .
But I there is little bit problem when remote is locking focus , preview is not showing . Is it normal or bug??
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Offline pernane

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Re: SX40 help
« Reply #19 on: 04 / April / 2012, 17:43:38 »
please waterwingz, how to make the SD card > 4Gb bootable?
thanks
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