This work was primarily supported by the National Natural Science Foundation of China (Grant No. U1532269 to JW) and the Ministry of Science and Technology of China (Grant No. 2016YFA0400900 to JW).

The successor to the DC40, the DC50 had the same 0.38 MP sensor. But it brought a zoom lens into the mix (34 mm to 111 mm equivalent), besides other features like a flash. The DC120 had a 1.2 MP ...