Meanwhile I realised I shouldn't be using the parameter "manualfocusdrive"
as that controls focus and not zoom.

However, I have tried to change the "eoszoom" parameter but it has no
effect and I can't change it's value.
Should I be able to control the zoom of the Canon G7 X Mark III?

Thanks again for your help.

On Wed, Feb 12, 2020 at 2:26 PM Nuno Pereira <n...@pro-drone.eu> wrote:

> Hello,
>
> I am currently using a canon G7X Mk III with gphoto2.
> I have managed to capture and download photographs using both gphoto2 from
> the terminal and with C++. I have also managed to change other parameters
> such as capturetarget and save the photographs to an SD card.
>
> However, I am having problems controlling zoom through gphoto. I read that
> first I need to change the parameter "viewfinder" to 1, which i can do
> because the screen goes black when I do it. After that i try to set the
> "manualfocusdrive" using (for example) "Near 1" or "Far 2" but
> nothing happens, but it also doesn't give me any error message.
>
> Do you have any idea how to fix this and how I could control the zoom with
> gphoto?
>
> Many thanks for the help,
> Nuno
>
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