Tool for calculating precise Av96 and TV96 values - page 2 - Script Writing - CHDK Forum

Tool for calculating precise Av96 and TV96 values

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Offline eponymous

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  • 38
  • Canon A4000
Re: Tool for calculating precise Av96 and TV96 values
« Reply #10 on: 21 / August / 2014, 14:31:05 »
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Two years later...

I also tested this out with my PowerShot A4000 IS, and got the same values you did. Additionally, for ISO 1600 I got 795.

Happy to update the spreadsheet, but did you want to?
John

Re: Tool for calculating precise Av96 and TV96 values
« Reply #11 on: 23 / August / 2014, 03:20:00 »
Go ahead and update it.  My S3 is working fine, but doesn't give much opportunity to test for the capabilities the new models have!
My daughter and I are driving south this weekend to try to mountain-bike up the one trail open to bikes in the Mount Saint Helens blast zone.  My S3 is coming along in the hope I can see though my sweat and stop shaking long enough for a few shots.
S3 IS with LensMate filter/hood adapter

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Offline eponymous

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  • 38
  • Canon A4000
Re: Tool for calculating precise Av96 and TV96 values
« Reply #12 on: 23 / August / 2014, 17:46:18 »
OK, done.

I did a few things:

  • Split out Av, Tv, and Sv into their own sheets.
  • Added a column to Tv showing the actual shutter speeds, in addition to the rounded-off ones
  • Modified some of the rounded-off values to be more rounded off, including using the standard speeds found on cameras (like 1/15 instead of 1/16).
  • Cleaned up some formatting
  • Added a notes sheet

Hope it's useful.
John

 

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