I've put together a new M/S rig of a MKH8040 + MKH30 - still waiting for some of the pieces to arrive. I often hear about the strong low end pickup on the 8040 and know that's there's the MZF8000 filter which has a hard low cut at 16Hz (among other features).
I'm curious, to those who have spent some time with the 8000 series mics, especially in a M/S esteem, do you find the MZF8000 to actually be useful to the point it's very much worth dropping the $500 to get it, or more an "hmm, well, it may be useful but not worth the $500" situation. The MS rig has a stand but is also being prepared as a handheld (Rycote Windshield AE and Connbox 3). It seems these handheld situations are where mentions of the low frequency pickup are noted.
I am totally willing to drop the cash for the filter, yet wanted to see what the consensus was on how useful the MZF8000 actually is. Thanks!