[CoolhandJo (Paul)]

Just thought I would post my recent experience with Baader Fringe killer. I use an Achromat at F7 and the Fringing on RGB is not useable. I stumbled upon the Baader Fringe Killer and it reduce the fringe by over 70% and makes the RGB subs useable.

taken on different nights and one night moon very close but these give a good indication on how effective this filter can be for an Achromat