[NT73]

Hey NT73:

Great photos of the construction.

I find this ...>read <...question: Any chance that one of these could be fitted with snaps or some other fastener that would allow it to be carried totally flat and *snap* together for usage?

Ah I see what you mean now and yes it could be fitted with snaps/press studs but why? It is flexible and will fold in half, and regain shape when pushed on to the lens. Mine is a bit messy looking at the joint but it is glued using evostik. It weighs virtually nil and it will also fit over the lens back to front (petals nearest camera)
Mine was made a little bit tight so it is and interference fit (It would knock off with a tap on the side) but I think the wind would not remove it. You could stick it in your pocket or slide it on your wrist maybe. I have now made 3 hoods from one A4 sheet.
And my joints are getting neater.
Another idea... A small velcro piece, glued to outside of hood and another to your sleeve or trouser leg..whatever.