"Telephoto" refers to a type of camera lens that allows you to capture distant objects or subjects with clarity. It makes things that are far away appear closer, helping you take detailed and close-up pictures of far-off scenes. Full definition
The range of optics used extended from conventional cameras with telephoto lenses to combinations consisting of digital cameras with high - quality lens telescopes. (scientificamerican.com)
The Apple 7 Plus brings a faster A10 processor, water resistance, stereo speakers, more RAM, more internal storage capacity for the same prices, best LCD available on a phone, improved front - facing camera, secondary telephoto camera lens, and more battery capacity. (zdnet.com)
Out of the two, one is a 12 - megapixel sensor with wide - angle lens, whereas the second is a 20 - megapixel sensor with telephoto lens for up to 3X lossless zoom. (bgr.in)