Hello Folks
About lenticular shield differences with flat round shield :
Is much more difficult to make .
You can carry javelins with the same hand.
Shield strike with the edge is weaker.
Slightly more resistant to penetration ?
Better resistance to shield manipulation from the enemies weapons ?
I take any more informations or correction :p, even just a book name.
Cheers !
Alexis

https://www.youtube.com/watch?v=XvDqodS6lF8
I find this but i don't speak Deutsch :(