diff --git a/jaxpm/lensing.py b/jaxpm/lensing.py
index d6c4a93..b4beeef 100644
--- a/jaxpm/lensing.py
+++ b/jaxpm/lensing.py
@@ -44,16 +44,13 @@ def density_plane(positions,
 
 def convergence_Born(cosmo,
                      density_planes,
-                     dx, dz,
                      coords,
                      z_source):
   """
   Compute the Born convergence
   Args:
     cosmo: `Cosmology`, cosmology object.
-    density_planes: list of tuples (r, a, density_plane), lens planes to use 
-    dx: float, transverse pixel resolution of the density planes [Mpc/h]
-    dz: float, width of the density planes [Mpc/h]
+    density_planes: list of dictionaries (r, a, density_plane, dx, dz), lens planes to use 
     coords: a 3-D array of angular coordinates in radians of N points with shape [batch, N, 2].
     z_source: 1-D `Tensor` of source redshifts with shape [Nz] .
     name: `string`, name of the operation.
@@ -66,7 +63,9 @@ def convergence_Born(cosmo,
   r_s = jax_cosmo.background.radial_comoving_distance(cosmo, 1 / (1 + z_source))
 
   convergence = 0
-  for r, a, p in density_planes:
+  for entry in density_planes:
+    r = entry['r']; a = entry['a']; p = entry['plane']
+    dx = entry['dx']; dz = entry['dz']
     # Normalize density planes
     density_normalization = dz * r / a
     p = (p - p.mean()) * constant_factor * density_normalization