I already have the Uv/Ir cut filter, so it will be No extra expence for me.
I have tried to Google the subject, but feel i haven't found out much.
Will i benefit from it, or will it make things worse.
I'm currently using a cheap achromat, a skywatcher startravel 120 F5
All the best.
Edited by GKA, 19 November 2019 - 03:12 AM.