If you plan on recording in High Def, then there's not problem as all UK HD TV sets support 60Hz, however most American HDTV sets do NOT support 50Hz.

If planning on outputting to DV, then there are plenty of programs out there that to decent 60>50 conversion if you dont mind shelling out a few extra dollars.

The voltage problem can be overcome by a stepdown transformer.

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It's not about what camera you use or how much it cost.

It's about what you shoot,
how you shot it,
and how you edit it :P