DIFF Subgroup
G02B 13/04 Reversed telephoto objectives
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Optical objectives specially designed for the purposes specified below > Reversed telephoto objectives
CPC:
Optical objectives specially designed for the purposes specified below (with variable magnification G02B15/00) > Reversed telephoto objectives
No child classifications to compare. This is a leaf node in both IPC and CPC.