The D5 has been used on the ISS since 2017, including EVAs:

* https://en.wikipedia.org/wiki/List_of_cameras_on_the_Interna...

The ISS now (also?) has Z9s. So they're both generally known-quantities.

Yeah other folks gave better insight while I was writing my comment, oops...

Mass higher up the rocket costs several multiples more mass in propellant and propellant handling lower in the rocket. And the more deltaV you want the higher the multiplication. (If I remember right some weight issues of some kind on the Apollo capsule and or lander required a common bulk head in the first stage to make up the performance loss!)

However cameras probably fall into the variance in astoraunt weight somewhat.

Is that the Rocket or the Craft+Mission payload?

My understanding is it's on the order of 5-10 pounds of rocket juice to get one pound of something to LEO, thus the question.