I have this mic, that was quite cheap. I don't know to much about mics but is the shotgun condenser mic suposed to only pick up the voice when its pointed at it? the mic i have seems to pick up a lot of room tone buzz, and if im talking away from the mic it will still pick it up.
If you point a camera at a person does it record only the person? A mic will pick up all the sounds in a given area. There are no "magic mics" that will pick up only the dialog. The degree to which the mic will single out the dialog and reject other sounds will depend upon the type of mic, the mic polar pattern, the quality of the mic, the specific situation and the expertise with which the mic is used.
A passable budget shotgun mic is going to be at least $200. If it is a condenser mic it will require phantom power, either from an internal battery or an external source. With your camera you will probably have to use a battery and an XLR to mini-pin adapter, or else you will have to get a mixer/converter that like the juicedLink or the Beachtek. Be advised that the less expensive of the juicedLink or the Beachtek lines
do not supply phantom power.
You can make a DIY boom pole for about $40.
As I and many others have mentioned in numerous other posts, poor sound will
NEVER be forgiven. If you have good sound your audience will forgive a multitude of other technical problems.
The biggest problem with being a "sound guy" is that no one ever notices if you've done a good or even a great job, only when you screw up or you are asked to do the impossible, like cleaning up horrible production sound