All photos in this article were shot with a Canon 90D and one of two lenses - either a Canon 100-400mm or a Canon 600mm F/4 III. My Canon 90D camera with its 1.6x crop factor due to the small sensor size nicely caught this vermillion flycatcher with a Canon 100-400mm lens set to 400mm hand-held. Since I seldom shoot hand-held, I favored a higher shutter speed of 1/500 second and set the image stabilization to Mode 1 so all directions were stabilized for camera movement. Not