We didn't have much success with the "Swann" filter, which can in some cases produce higher-contrast images of comets. So, I replaced it in the filterwheel of our main CCD camera with a Johnson-Cousins B filter, of this sort:
We recently received this filter from Optical Structures Corp., in a 49.7-mm unmounted format. This is an interference filter, unlike most of our others, which are colored glass.
I opened the ATIK filter wheel, which used to look like this,
and remove the Swann filter from position 4. In its place, I put the new B filter.
The wheel now looks like this:
I also modified the configuration file of our MaximDL program, under both of the accounts we use at the Observatory, so that it reads as follows:
filter name
---------------------------
1 empty
2 R
3 V
4 B
5 I
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Last modified 04/14/2019 by MWR.