Converting omni mic into a directional one

[marc]

How would you go about converting an omnidirectional mic into a directional
boom mic.
Any practical explanation how to it yourself. Any sites or books which
explain and show how
to do this? I guess something along the lines of how would you go
about attaching a tube to the mic.
The mic is an earthworks m30bx: http://earthworksaudio.com/m30bx.html#

 

[TimPerry]

How would you go about converting an omnidirectional mic into a directional
boom mic.
Any practical explanation how to it yourself. Any sites or books which
explain and show how
to do this? I guess something along the lines of how would you go
about attaching a tube to the mic.
The mic is an earthworks m30bx: http://earthworksaudio.com/m30bx.html#

1: place microphone at the focal point of a parabolic dish.

or

2: swap with me for a shure PG 81