My bag (or backpack) routinely weighs more than that. My 600mm f4/ ED IF AIS Nikkor and 400mm f/2.8 ED IF AIS Nikkor alone weigh almost 24 pounds. When I photograph wading birds, add a carbon fiber tripod and gimbal head, the above lenses plus my 200mm f/2 ED IF AIS Nikkor, the D850 and D500 both with battery grips and a lightweight camp stool and I am WAY over that though I will admit though, at almost 63 it does feel like it gets a little heavier each year........