In fact, other then the 50MP 5DS and 5DSR models, the 90D, and M6 II are currently Canon's highest-resolution stills cameras across the board. EF-S 18-135mm f/3.5-5.6 ISO Nano USM: 135mm ...
In terms of the Canon EOS 90D's ability ... When "prefocusing" the camera by half-pressing and holding down the shutter button before the final exposure, the 90D's shutter lag was quite low ...