Yes, 이거 봐! is the most common phrase for "Look (at this)!" between friends. It is a colloquial form of 이것 봐. There is also 이봐, a contraction of 이거 봐, but it is mostly used in arguments and fights, so avoid it :-)

Honestly~ I'm not Korean, I'm learning Korean too, it must be something like: 이거 봐!