Imaging system with movable non-symmetric lens

An imaging system comprising:

• an image sensor;
• a lens module configured to direct light onto the image sensor, the lens module having different magnifications along substantially orthogonal axes parallel to a sensing plane of the image sensor, the lens module comprising:
• a first group of one or more optical lenses comprising a symmetrical optical lens;
• a second group of one or more optical lenses comprising a first non-symmetrical optical lens with a first optical power along a first axis parallel to the sensing plane;
• and
• a third group of one or more optical lenses comprising a second non-symmetrical optical lens with a second optical power along a second axis parallel to the sensing plane;
• and
• a controller configured to generate an adjustment signal to focus an image onto the sensing plane of the image sensor by adjusting distances of the first group and the second group along an optical axis of the imaging system.