The camera rated -3 EV , autofocus well acquiring focus dark.But Canon 5D Mark IV really shines high ISO performance.The 5D Mark IV ’ sensor easily outperforms 5D Mark III , 6D Mark II , every Canon crop-sensor DSLR ever produced.Images great ISO 1600 , still usable ISO 3200 , 6400 , even 12800.This makes Canon 5D Mark IV perfect need carry shooting , even ultra-dark conditions , wedding photographers astrophotographers.Plus , Canon 5D Mark IV great across board , packing 30.4-megapixel sensor , dual card slots , 61 AF points 41 cross-type points , 7 frames-per-second continuous shooting.Note Canon 1D X Mark II ( Canon ’ $ 5000+ flagship camera ) give better photos Canon 5D Mark IV , especially ISO 6400 12800.But unspeakably high price makes non-starter pretty much every enthusiast even semi-professional photographer , I opted leave Nikon equivalent , D5 , list .