Therefore there has to be a lag, even if itвЂ™s only a matter of milliseconds. ItвЂ™s simple physics light has to be turned into photons, has to go into a processor and circuitry, then go to another processor, then to a display, then be converted to an image, then transmitted to your eye. In the here and now, even the best EVF suffers from lag. Mirrorless may indeed be the future of photography, but right now a lag-free electronic viewfinder is still very much that вЂ“В something that only exists in the future. While the Canon EOS-1D X Mark III is brimming with the latest technology, itвЂ™s built around one fundamental piece of throwback hardware: an optical viewfinder. The Canon EOS-1D X Mark III supports dual CFexpress cards вЂ“В and they are a revelation! (Image credit: James Artaius / Digital Camera World) Key features Max burst: Optical viewfinder 16fps mechanical shutter / Live View 20fps mechanical or electronic shutterД¬onnectivity: Wi-Fi (2.4GHz), USB-C (USB 3.1 Gen 2), Bluetooth, HDMI mini, external microphone, headphone Jack, N3 remote release terminal, Flash PC, gigabit ethernet (10BASE-T, 100BASE-TX, 1000BASE-T) LCD: 3.2-inch fixed touchscreen, 2.1million dots Viewfinder: Pentaprism, 100% coverage, 0.76x magnification, 20mm eyepoint Metering modes: Evaluative, partial, spot, center spot, AF point-linked spot, multi-spot, center weighted average Canon EOS-1D X Mark III + Canon EF 600mm f/4L IS III USM (1/4000 sec, f/4, ISO400) (Image credit: James Artaius / Digital Camera World) SpecificationsДЄF points: Optical viewfinder вЂ“В phase detection using AF-dedicated sensor,ДЎ91 points (155 cross-type) / Live View вЂ“ Dual Pixel CMOS AF, 3,869 points

Eos 1d mark iii review