KEY_SHOOT_HALF press / release - only works with large zoom changes? - General Discussion and Assistance - CHDK Forum

KEY_SHOOT_HALF press / release - only works with large zoom changes?

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Hi,

I have noticed that using the kbd_key_press function to press KEY_SHOOT_HALF usually activates the AF and AE mechanisms the first time I use it, but that if I use kbd_key_release and then kbd_key_press again to reactivate the AF and AE mechanisms, then the camera only sometimes seems to listen. The pattern I have noticed is that if the lens zoom changes more than a notch or two in between the release and the re-press, then the AF and AE behavior is activated, however if the zoom stays the same, then most often the camera just does nothing when the key is re-pressed, even if the lighting in the scene changed dramatically.

Has anyone seen this behavior before? Is there some trick I'm not doing properly, or is this just a limitation on what we can control using CHDK?

Thanks for the help,

- Tim

 

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