It’s partly because of how you’re leaning, partly the extremity of your focal length, and partly cos we don’t build things in perfect grids.
Do you have access to do it more frequently? What’s your setup? Traditionally you needed a hole in the bottom of the aircraft so you could use levels to get the camera dead straight. I think a lot of stuff way way back also had grid markers to allow for distortion.
Egg-sucking question, are you using a spirit level on top of the camera?
It’s partly because of how you’re leaning, partly the extremity of your focal length, and partly cos we don’t build things in perfect grids.
Do you have access to do it more frequently? What’s your setup? Traditionally you needed a hole in the bottom of the aircraft so you could use levels to get the camera dead straight. I think a lot of stuff way way back also had grid markers to allow for distortion.
Egg-sucking question, are you using a spirit level on top of the camera?