Compact double folded tele cameras including four lenses of +-+-, +-++ or +--+; or six lenses of +-+-+- or +-+--- refractive powers

A camera module, comprising:

• a lens with N=6 lens elements L1 divided into a first lens group (G1) having at least two lens elements, and a second lens group (G2) and having an effective focal length EFL, an aperture diameter DA, a f-number f/#, a total track length TTL and a back focal length BFL, wherein each lens element has a respective focal length fi and wherein a first lens element L1 faces an object side and a last lens element LN faces an image side;
• an object side-optical path folding element O-OPFE for folding a first optical path (OP1) to a second optical path (OP2);
• an image side-optical path folding element I-OPFE for folding OP2 to a third optical path (OP3), wherein OP1 and OP2 are perpendicular to each other and wherein OP1 and OP3 are parallel with each other;
• and
• an image sensor having a sensor diagonal (SD),
• wherein the camera module is a folded digital camera module, wherein G1 is located at an object side of the O-OPFE and G2 is located at an image side of the O-OPFE, wherein the EFL is in the range of 8 mm<EFL<50 mm, wherein the camera module is divided into a first region having a minimum camera module region height MHM and including G1 and the O-OPFE, and into a second region having a minimum shoulder region height MHS<MHM and including the I-OPFE and the image sensor, wherein all heights are measured along OP1, wherein an aperture height of the lens is HL and wherein HL/MHS>0.9, wherein the camera module has a minimum camera module length MLM, wherein EFL>1.1·MLM, and
• wherein at least one lens element in G2 is cut on at least one side to reduce MHS and MHM, where the camera module has an overall height (HM) equal to MHM plus a penalty, the penalty accounting for movement space required for optical components within the module and satisfying 0.5 mm<penalty<3 mm.