In a nutshell
This MS pair Sennheiser MKH 50 or MKH 40 - MKH 30 has all MKH series advantages: great sturdiness, very high output level, very low distortion and excellent background noise reduction. It is especially appropriate for extreme climatic condition shooting: it is temperature, damp and condensation insensitive. Each microphone has a low-cut filter and a -10 dB attenuator. Some sound mixers prefer mounting an hypercardioid microphone (MKH 50) rather than cardioid (MKH 40); this mounting offers a better left-right separation but sometimes creates a "hole" in the middle. MKH pair main drawback is its size: unlike its competitors, it is not possible to detach capsule away from preamp, so windscreen is quite large (coincident capsules).
This product is commonly named:
Sennheiser MKH 40, Sennheiser MKH40, Sennheiser MKH-40, MKH 40, MKH40, MKH-40, Sennheiser MKH 50, Sennheiser MKH50, Sennheiser MKH-50, MKH 50, MKH50, MKH-50, Sennheiser MKH 30, Sennheiser MKH30, Sennheiser MKH-30, MKH 30, MKH30, MKH-30
This product is commonly named:
Sennheiser MKH 40, Sennheiser MKH40, Sennheiser MKH-40, MKH 40, MKH40, MKH-40, Sennheiser MKH 50, Sennheiser MKH50, Sennheiser MKH-50, MKH 50, MKH50, MKH-50, Sennheiser MKH 30, Sennheiser MKH30, Sennheiser MKH-30, MKH 30, MKH30, MKH-30