New to OPENMV, How far away do I place my CAM?

How far away would I need to place the CAM from an object (iPad screen) that is approx 250mm x 175mm? I would like it to be as close as possible so the whole 250mm x 175mm would take up the whole FOV I would assume.

New to this world, so I am at a lost when it comes to degrees and FOV and distance. If someone knows a good resource for me to learn I’d be grateful for it.

Hi, see this:

Then for the camera sensor size see the OV7725 data sheet and see the OpenMV Cam H7 product page for the lens focal length.

Thank you. I will for sure check out that site, looks very informative.