Superb filter, just I don't use it. It's less than 2 weeks old, and I have NEVER used it. It gets rave reviews, packaged really well. Standard 48mm filter thread size.
https://www.cyclopsoptics.com/filter...pectra-filter/
Like I said, NEW condition - not even mounted to my setup.
Price new ex-Cyclops translates to $265 AUS WITHOUT postage.
My price is
$200 POSTED EXPRESS