What LP filter for a stock dslr + rokinon 135mm f/2 under bortle 5-6 skies

[Jorden Klapproth]

Hey guys, so im upgrading to a Heq5 mount from a SA which means my exposure time will be basically doubled 90sec-180sec+. Im after a light pollution filter as if i go over 60-90sec subs at iso 800 they become washed out. I have a stock 750D canon. Ive seen a few LP filters such as the astronomik cls clip filter, Optolong l-pro etc. Any advice would appreciated:)

clear skies

[PeterCPC]

If you have orange street lights then something like a cls but, if you have LED streetlight, then an IDAS D2 would be best.

Peter

[Jorden Klapproth]

okay thankyou