Hi all,
up for sale is an Astronomik EOS 12nm Ha Clip-in filter. Suitable for APS-C DSLR cameras such as Canon 600D, etc.
Was rarely used, and is no longer used after my Canon 600D was sold. In excellent condition.
see here
https://www.astronomik.com/en/clip-f...-ccd-12nm.html
$230 including express postage in Australia