Wooden Lathed Lamp Shade

I Stumbled Upon this great little film showing a lampshade being made on a lathe, Initially I thought 'what a waste of wood' but it is fast growing pine which was going to be firewood and the waste is the centre poor quality sap wood.

I would love to tell you more info, thickness of the shade, how many different timbers has he tried etc etc so if anybody knows please leave a comment   :-)