In reply to StuDoig:
> (In reply to liz j)
> It doesn't have to be the batteries either. My Olympus Tough Camera (metal casing) has a huge affect on a compass if in close proximity (less than 6"). once I spotted this I checked some other items I carry and found GPS also caused the compass to deviate, as did my mobile phone, but all needed to be within inches of the compass. The camera was by far the worst though.
>
> If your worried that its something your carrying, then look for consistency - it should happen every time more or less.
>
> Cheers,
>
> Stuart.
That is exactly the same camera as I was carrying. I won't be making the same mistake again!