That sounds good Rich - I only overlap about 10% and mostly shoot in portrait, shooting in portrait makes life soooooo much harder. So I would suggest shooting in landscape and giving a overlap of max 20%.

I used to use Arcsoft's Panorama maker and yes the Canon software (might be the same thing) but recently am using PTGui, it's not always successful and if it isn't you've gotta do what Eddie said, merge 2 save, merge 2 save then merge the saved half panos...

Don't forget your tripod, no matter what the weather or light...

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