Orthographic camera cuts off half of screen in Web Player - resolution error?

Difficult to word this question, but one of my scenes is like a comic strip, where the camera moves along a path to display different pictures of the comic. However, the camera does not scale to the screen size (it is an orthographic camera) - i.e. it renders the comic on half of the screen in web player, the other half is simply a black screen.

Obviously I want the comic to be shown on the entirety of the screen rather than just half - this game is being built for Windows Phones with a 15:9 aspect ratio.

Setting the camera's aspect ratio on void Start did not fix the issue. Also, changing the camera back to Perspective did not fix the issue (As the comic is drawn in landscape, the perspective camera had a viewport rect of W = 1, H = 0.5 and X and Y = 0.

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Any ideas? I have tried making the camera's W and H values even, but this distorts the comic strip and makes it look crap.

Essentially what I'm asking is, is it possible to make a custom camera size (W=1, H=0.5) but have that camera fit the entirety of the screen.