18973781. CONVERTER LENS, INTERCHANGEABLE LENS, AND IMAGE CAPTURING APPARATUS (CANON KABUSHIKI KAISHA)
CONVERTER LENS, INTERCHANGEABLE LENS, AND IMAGE CAPTURING APPARATUS
Organization Name
Inventor(s)
Hiroki Ebe of Utsunomiya-shi JP
Shinichiro Saito of Utsunomiya-shi JP
CONVERTER LENS, INTERCHANGEABLE LENS, AND IMAGE CAPTURING APPARATUS
This abstract first appeared for US patent application 18973781 titled 'CONVERTER LENS, INTERCHANGEABLE LENS, AND IMAGE CAPTURING APPARATUS
Original Abstract Submitted
A converter lens according to an exemplary embodiment of the present invention is a converter lens that has a negative refractive power and increases a focal length of an entire system. The converter lens includes a front group having a positive refractive power and a rear group having a negative refractive power, and the front group is a lens unit having a combined refractive power having a maximum positive refractive power in a case where the combined refractive power is obtained by combining a refractive power of each lens in order from the lens closest to an object toward an image side. At this time, a focal length of the front group, a focal length of the converter lens, and a lateral magnification of the converter lens when the converter lens is disposed on an image side of a master lens are determined as appropriate.