回复：If you want pure white background, then you need

来源: 于 2012-02-17 17:57:33 [旧帖] [给我悄悄话] 本文已被阅读：次

distance between your subject and the backdrop.  As long as you have 6 feet distance,you can speedlite to power your backdrop behind the subject.

Not sure why you want to dress the subject with white dress if your backdrop is white.

Best regards,

Alex