Observations with multiple instrument configurations
====================================================

The LCO observation form allows multiple filters to be selected for a single
observation. Each filter can have its own exposure count and exposure time
settings. In the screenshot below, ``Bessell-B`` is selected for three 30
second exposures, and ``Clear`` is selected for four 10 second exposures.

.. figure:: images/multiple_filters.png
   :figclass: align-center

Note that not all filters need to be applied: the exposure count and exposure
time inputs can be left blank for unwanted filters. However, at least one
filter must be used.