› Forums › Comets › C/2020 F3 (NEOWISE) › Hi Grant,
19 September 2020 at 9:29 am
#583128
![](https://britastro.org/wp-content/uploads/2015/01/picture-213-1420547117-80x80.jpg)
Participant
Hi Grant,
I was perusing this thread looking for another comment when I saw your question, apologies for the late answer…
The filter was a HOYA HMC circular polariser and yes it’s just an ordinary photographic type as recommended for DSLR’s using autofocus.
It was a fun experiment. Nice to see a bit of theory in practice!
Cheers,
Bill.