I have a question about Heisenbegs gamma-ray microscope and observed electrons. In this example is it so that we observe the electron only in limited angle of aperture θ. So the remaining electrons which scatter the gamma ray outside the aperture θ are not being observed at all? What would be the limits of Δx for observed electrons at aperture θ and how do we get the actual total electron count (with that I mean aperture independent count)? Thanks!