Hi there!
this is my first post here , and I have a question about this lens.
Unfortunately there is no any sign on it. There are only 2 glass elements one on the front () and behind one )( about 180mm diameter. I think there are 2 elements missing, anyone can tell me what is it? thanks

http://allegro.pl/duza-rzecz-i1531388298.html

Regards
Michał