Is it best to use the on-microphone low cut filter or to just do the low cut in post during the audio edit? FYI, this is usually for wind rumble, but other distracting LF sound too.

It's a little more work to do it in post, but I think the end result is better tailored to needs.

I am curious what the audio experts do.
Thanks

I'd say you want to record the cleanest sound possible so if you can kill it before it goes to tape do it.

Back in the analog days, I would definitely recommend doing during recording--there is a lot of energy in the low end and it could easily overwhelm a tiny analog recording channel. Still potentially a problem with the electronics too.

I'd vote to do it on the mic. You may or may not be able to get it better in post. But if you leave the shoot knowing you've got good audio, that can't be bad.

generally better to lowcut at the mic, or mixer input PRE limiter because the sometimes massive LF input can trick any limiter / compressor to kick in when it shouldn't causing a drop in level that shouldn't be there.

Low cut on the mic as it is done at the capsule stage and prevents the amplifier in the mic overloading, this goes for attenuators too they prevent overloading the op amp inside the mic.

Thanks for all the answers, using the low cut filter on a mic certainly makes a lot of sense for several reasons.