Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length

Introduced: September 1968

Title

Titles differ between systems:

IPC: Telephoto objectives, i.e. systems of the type + – in which the distance from the front vertex to the image plane is less than the equivalent focal length

CPC: Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length

Full Title

Full titles differ between systems:

IPC:

Optical objectives specially designed for the purposes specified below > Telephoto objectives, i.e. systems of the type + – in which the distance from the front vertex to the image plane is less than the equivalent focal length

CPC:

Optical objectives specially designed for the purposes specified below (with variable magnification G02B15/00) > Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length

No child classifications to compare. This is a leaf node in both IPC and CPC.