Most mobile phones set the 23 - 27mm focal length to 1x (1.0x). Thus, the super wide-angle is 0.4x, 0.5x, 0.6x, and the medium telephoto is 2.0x, 3.0x, 5.0x... But this brings about two basic ...

Posts from this author will be added to your daily email digest and your homepage feed. is a reviews editor who manages how-tos and various projects. She’s worked as an editor and writer (and ...