Built-In Planes
Use different sets of parallel and intersecting planes as slices.
show complete Wolfram Language input
In[3]:=

Grid[Partition[
  Table[SliceContourPlot3D[
    1/Sqrt[(1 + x)^2 + (1 + y)^2 + z^2] - 1/
     Sqrt[(-1 + x)^2 + (-1 + y)^2 + z^2], 
    slice, {x, -2, 2}, {y, -2, 2}, {z, -2, 2}, 
    Contours -> Range[-2.5, 2.5, 0.5], Evaluate@opts], {slice, 
    slices}], 3]]Out[3]=



















 
  
  
  
  
  
  
 