Antlia 4.5Nm 2 inch SHO Narrowband Filters - used for one season and lived inside the filter wheel all that time. Have upgraded to the 3nm version so the 4.5's have to go. In as new condition with original boxes - save around $500 off new price.
$900 ONO
https://drive.google.com/file/d/1-7O...ew?usp=sharing
https://drive.google.com/file/d/1-2J...ew?usp=sharing