Don Haines's comments have inspired me to test the SX50 at 200x zoom - 50x optical plus 4x digital. I am on a brief trip to Jerusalem and, as usual, slung my SX50 into my case. Today had beautiful light. Here are some shots, ranging from 24-4800mm. The quality of the digital zoom really surprised me. All the shots were taken as jpegs, with no processing - straight out of the camera. To start with, the Church of the Dormition: 24; 200; 1200; and 4800mm equivalents.
5D IV, 5DS R, 7D II, EOS-M, Powershot G3 X, 400mm DO II, 300/2.8 II, 1.4xTC III, 2xTC III, EF 1.8 STM, EF 70-200/4 IS, EF 24-105, 15-85, 100-400 II, Sigma 10-20, Sigma 150-600mm C, EOS-M 18-55, f/2 22, 11-22