В 07:23 +0200 на 01.09.2011 (чт), [email protected] написа:
> If by Trisquel-compatilbe you mean "can be connected to a computer running  
> Trisquel" then most cameras should work as they are recognized as mass  
> storage devices when connected via USB and they support memory cards which  
> can also be connected to a computer.

I don't know for new models, but few year ago some cameras used the
Picture Transfer Protocol (PTP)[1] over USB. They did not provide mass
storage interface. The libgphoto2-2 library provides access to this
protocol. There are  programs (apt-cache rdepends libgphoto2-2) that use
it.

> 
> If instead you mean "the camera supports flashing of free firmware or comes  
> pre-installed with free firmware that can be updated" that will probably  
> limit your options. There are a few options however, such as Magic Lantern  
> for Canon cameras (the supported cameras probably cost at least 500 dollars):
> 

Also for some Canon cameras there is the CHDK firmware extension. [2] It
works on top of the proprietory factory firmware and provides some extra
features.

[1]http://chdk.wikia.com/wiki/CHDK
[2]https://secure.wikimedia.org/wikipedia/en/wiki/Picture_Transfer_Protocol


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