Hopefully my pics won't put you off it, it can take some really amazing shots!
You can buy it here, you put it on your avatar and it sort of hijacks the VRC camera's view with it's own. You need both of these for the depth of field shots. https://logilabo.booth.pm/ 
Here's how to set it up. You'll have to use translation tools I'm afraid. http://static.logicmachine.jp/vlens/