A new method using cemented lenses to improve the design of Panoramic Annular Lens (PAL) is introduced. This
structure can help to realize the design of PAL optical system with long focal length, which can help to see much further
than the ones with short focal lengths. It can also keep the volume of the system moderate. The chromatic aberration of
PAL is investigated theoretically. Method of selecting proper cemented glasses of PAL is also discussed. A doublet PAL
and its relay optics with a total effective focal length of 10.3mm are realized.