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-rw-r--r--docs/filters.rst6
1 files changed, 4 insertions, 2 deletions
diff --git a/docs/filters.rst b/docs/filters.rst
index bbdc335..287a0c5 100644
--- a/docs/filters.rst
+++ b/docs/filters.rst
@@ -1311,11 +1311,13 @@ Phase retrieval
Propagation distance can be specified for both x and y directions together
by the :gobj:prop:`distance` parameter or separately by
:gobj:prop:`distance-x` and :gobj:prop:`distance-y`, which is useful e.g.
- when pixel size is not symmetrical.
+ when pixel size is not symmetrical. :gobj:prop:`distance` may be a list in
+ which case a multi-distance CTF phase retrieval is performed. In this case
+ :gobj:prop:`method` must be set to ``ctf_multidistance``.
.. gobj:prop:: method:enum
- Retrieval method which is one of ``tie``, ``ctf``, ``qp`` or ``qp2``.
+ Retrieval method which is one of ``tie``, ``ctf``, ``ctf_multidistance``, ``qp`` or ``qp2``.
.. gobj:prop:: energy:float