Sigma 100-400mm F5-6.3 Contemporary versus Sigma 150-600mm F5-6.3 Contemporary » 100400mm CropSensor Reb 1500_1
Here is the 100-400mm at 400mm on the crop sensor Rebel.
100400mm CropSensor Reb 1500_1 100400mm CropSensor Reb 1500_1