Hi Martynas, these cameras were created from a vertex array. We create a plane and do loop cuts to create a grid. We then remove edges and faces. After that, we parent one camera to the first vertex on the top left, then use a vertex array to add the cameras to the entire grid; then apply the array to arrive at the set of cameras snapped to the grid.

Thank you for your comments guys, I've edited the question and added a link to the blender file and a sketch. Unfortunately, the solution posted as no. 1 didn't work out.