I am about to make my first film, and only have one camera so I will be filming scenes from different angles. I was thinking the best way to go about this is to purchase a mic so I can use one continuous audio with all of the video. Where should I start? I know nothing about mics. What are the best brands for the best price? I really dont want to spend a lot of money on a mic initially. What about boom poles? Is buying a mic and mounting it on a pole the best way to go about it? I really dont want to spend more than $50, I know thats asking a lot, but for right now I dont need a top of the line mic. I just need to get the job done.