I am trying to decide if there is compelling reason to select one combination over the other.
1. Canon 1Dx w 100-400 II and Canon 7D M2 w 200-400. Total range 100-400 and 160 - 896.
2. Canon 1Dx w 100-400 II and Canon 1Dx w 600 II, 1.4 and 2.0 extenders Total range 100-400, 600, 840, 120.
The has greater range, though not continuous. Also weighs considerably more and costs a bit more. Plus the range is not continuous, discreet steps.
1. Canon 1Dx w 100-400 II and Canon 7D M2 w 200-400. Total range 100-400 and 160 - 896.
2. Canon 1Dx w 100-400 II and Canon 1Dx w 600 II, 1.4 and 2.0 extenders Total range 100-400, 600, 840, 120.
The has greater range, though not continuous. Also weighs considerably more and costs a bit more. Plus the range is not continuous, discreet steps.