The BP4029 (AT835ST) Stereo Shotgun Microphone from Audio-Technica offers two internally-matrixed modes which provide traditional "left-right" stereo. To accommodate varying acoustic environments, the user may select between a "wide" pattern (LR-W) with increased ambient pickup, and a "narrow" pattern (LR-N) which offers more rejection and less ambience.

In M-S mode, the BP4029 provides independent Mid and Side signals. This allows the Mid-Side balance to be adjusted as desired at the recording desk or mixing electronics, reducing the amount of equipment necessary in the field.

Independent line-cardioid and figure-of-eight condenser elements
Switch selection of non-matrixed M-S mode and two internally-matrixed left/right stereo modes

Audio-Technica BP4029 Specs:
Microphone
Sound Field Stereo
Capsule Condenser
Polar Pattern Cardioid, Figure-8
Pattern Selection Switched
High-Pass Filter 80 Hz, 12 dB/Octave
Performance
Frequency Range 40 Hz to 20 kHz
Impedance 200 Ohms
Connectivity
Output Connectors (Analog) 1 x XLR 5-Pin
Power
Operating Voltage 11 to 52 V
Physical
Dimensions ø: 0.83 x L: 9.29" / ø: 21 x L: 236 mm
Weight 3.63 oz / 103 g

Audio Technica BP4029 (Audio-Technica BP-4029)