BR, this was shot with a 24-120 @ 120mm. I walked all over town that day, easily 10 k. Had I been toting the 200-500 I would never have survived This crop is roughly a 200 mm FOV. I had the 24-120 on my D800, carying no other gear, an approach I use on long walking tours. I definitely agree, the tighter crop is an improvement. There are no rules, only suggestions and guidelines.