I think it's possible to use the camera's like you do,
just closer. If it's in an area laden with all the right
markers. There's the possibility to have one appear.
Use the same operation, and with the 6mp, & the
viewing for results, possibly would likely be a better
resolution, closer. Just not the possibility of catching
multiple auras, but if the camera is happening to be
pointed in the right direction, & operates right when
an aura flashes up, it's possible to figure out where
it came up from if it's in the open, rather than back
behind something else, which would be tougher to
try and find, unless maybe a large coil showed it,
in coordination with every thing else in searching.
Just thoughts, of how the distance issue may be
overcome. May be more difficult, but workable.
For me, it's well worth trying, & since markers
crossing are not necessarily the definite spot.