Hello !   I've got some questions about Super baltars: Which Kowa lenses are the 'copys' of them and very similar ? The cine prominar -lenses or which types ?   There are some Super Baltar lenses with the metall-rings on it and some lenses without this rings, they look a little bit different.   Whats the difference ?   Does anyone have some Informations about the serial-numbers and the age of the lenses?   Does anyone have some documents or brochures (in PDF) of this lenses ?   Thank