Hi,

The manualfocusdrive is for the focus motor, not the zoom motor ;)

zoom in EOS speak was largely for liveview zooming.

There is a "powerzoom" opcode, which is not yet hooked up, as I do not 
know the argument meaning.

Ciao, Marcus

On Fri, Feb 14, 2020 at 11:23:49AM +0000, Nuno Pereira wrote:
> 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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