Canon land. While some camera models can handle 250V if connected through their PC sockets, their hot shoes are limited to 6V. Likewise my RZ67 accepts 12V max. This posting claims that only Nikon cameras can take 250V through their hot shoes.
Please be careful before you claim that any camera can handle high trigger voltages, 300V can do a lot of damage to electronic circuits even if only a small capacitor is discharged.
And just before this pops up: sensitivity to high trigger voltages is not an issue of analog vs. digital camera. While most ancient cameras can handle 300V without problems, I would at least double check any camera less than 20 or 30 years old, see my examples of EOS 3 and RZ67.