Check out http://support.j
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Check out http://support.jvc.com/consumer/product.jsp?modelId=MODL027855&pathId=119&page=3&archive=true
Link to info panel at JVC. The model you own apparently has a 30GB internal HDD and the ability to record onto SDHC cards. The Everio GZ MG 155U has an optical/digital zoom, and 1/6″ CCD (1.07) megapixel CCD. Via the docking system it offers a multitude of i/o operations.
Sad to say, however, the camera’s stabilization is digital NOT optical, or “mechanical” as you thought. Sorry, but use of this will further challenge the image quality of an already tiny CCD signal.
When you click on the link, drag down the specs where it says video image stabilization and click to see the type of stabilization your model uses.