def METHOD_NAME():
    #ps.pixelsize[0] = float(scope.cam.GetPicWidth())
    vsx, vsy = scope.GetPixelSize()
    tsx = 0.7*vsx*scope.cam.GetPicWidth()#*1e-3
    tsy = 0.7*vsy*scope.cam.GetPicHeight()
    ps.pixelsize = np.array([tsx, tsy])
    ps.genCoords()
    dlg = ShiftfieldPreviewDialog()
    ret = dlg.ShowModal()
    dlg.Destroy()