The Field-of-View Dilemma

The location for our opening is a bathroom, and based on the descriptions and sequence of events in the film, we figured that the bathroom I have in y home would work the best for the scene. However, there is one issue... it is very, very small.

To get the opening shot we need, which is a push back on the main character on top of the toilet. Given the nature of the shot, we would only have about 3 feet of space from the subject to the camera. This would not be so much of a problem if I had the proper camera to pull of the shot, but I have a Lumix G7, which is a great camera, but it has a very small micro 4/3 sensor size.

The 2x crop factor means that our angle-of-view or field-of-view is chopped in half, which will make it very hard to get the shot wide enough to get the shot we need.

If I were to use the lowest focal length on my lens, 14mm, on a full-frame sensor, I would get a horizontal angle-of-view of about 104 degrees. A 14mm lens gives me about half that angle, and after doing some math, the sensor size problem because quite apparent.

This basically means that if we use the lowest focal length I have we would only get about 3.84 ft of horizontal view. 

After some measurements and discussion of how wide we need to with the shot, we think that a horizontal view of 4.5 feet would be the optimal width to get the shot we need. After reverse engineering the math, it seems that a 12mm lens will do the trick, giving us 4.45 ft of horizontal view.

Obviously, it is just a little bit short of perfect, but it will do. The real issue is that I don't have a 12mm lens, and they aren't cheap. 

This shot is integral to the aesthetics, but I am not spending this much money to get it. I will have to find another solution...