Hi, some days ago i had a little discussion with my father regarding photographic lens: he's an old Zenit/Praktica/M42 fanboy and says that older german and russian lenses are far better than japanese ones 'cause the latter have plastic lenses rhater than real glass...I can second this, 'cause actually i use those lenses and i love them.
Then i heard also that many jap manufacturers [above all, Nikon] often mix glass and plastic elements, and mainly beause some corrective lenses have complex shapes too difficult to manufacture with glass.
then i heard that a strange little company called HOYA [
] sells glass to Pentax.
I really like to know if this family rumors are true [my father is usually right, but also a bit exaggerated in his statements] and how to know what elements are glass and what are plastic, say for example, in the 18-55.
Just for say next time: "yes, maybe Nikon, but not Pentax...true glass only here!"
Thank you very much in advance