You can buy sheets of solar film on Amazon and eBay for about $18 that can be cut to make filters for your camera lens. That's what I've done. There are versions that come with cardboard holders to fit over the end of various diameter lenses. Your wife will want to get some of this filter material.My wife being a professional photographer has everything but the solar lens needed, but I do want to research more on the shadow approach and using paper as you mentioned. Thanks again to all, I hope everyone has a great seat for the event wherever you are!