Going on a suggestion, I have tried to put everything on a similar level rather than on differing levels. I think this has reduced the negative space and I am visualising the field depth in place, blurring the background layers.
However there is something wrong that as the camera zooms out feels off. I think this is the spacing between the rings as it seems to be leaving so empty space. I think I need to add/work out the flooring/ stands for these objects as this could also effect how it stands together and spacing.