Map large area with different start points for drone

I have a slight variation on all the great questions here. My question is does DD calculate the GSD when you change the camera and lens? My understanding is that on the desktop planner assumes the phantom 3/4/x3 camera? I want to run a x5s 15mm and I am aiming for 1cm GSD (a long back story as to why it needs to be so high detail and also creates another set of issues). I’ve calculated that in order to obtained a GSD of 1cm with the X5s and 15mm camera I would need to fly at 45 m AGL. Im trying to decide if I go for the Olympus 25mm lens