The on axis spacing between the first lens and {TAIL ~ second lens} is T12, the focal length of {HEAD ~ the imaging lens system} is f, and they satisfy the relation: 0.5<×100<15 
The on axis spacing between the first lens and { TAIL ~ second lens } is T12 , the focal length of { HEAD ~ the imaging lens system } is f , and they satisfy the relation : 0.5<×100<15
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH