[LewisM]

I have Baader LRGB and got in a Baader 7nM H-a the other day. The seating and height of the H-a in the carousel is significantly lower (cell height and depth) than the LRGB filters, and the substrate surface itself is a different distance "in" compared to the LRGB's.

Could this cause any parfocal issues, or just better to simply refocus H-a regardless?