Imported image auto resized ?

I am trying to import a 4200*5700 image in a fusion project in 1080p .
My goal is to use a Camera3D and image plane for fly over the image so I need an image bigger of 1080p for retain this resolution ( or little over ) when the camera go near the image.

In the attached picture you can see how the original 3296*5384 image is shrink about 3 times
How can preserve the original quality?

davinci 2.jpg (53.13 KiB) Viewed 505 times

What size is the background size?
Also I think importing such a big size through the Media In node isn't the best way to approach this, since I believe the mediaIn is always scaled back to the timeline resolution. (although this might have changed in recent builds, I can't remember)

Import your big image as a loader and it will be in the original resolution.