Tommy Grønvold has repeated the measurement that Rory did.
Location: 59.058238, 10.407123
There is a straight edge set close to the horizon. This controls any potential distortion due to lens distortion. Here is the image scaled to 1920×1280, click for the full size:
You can download the original, unedited RAW image file directly from the camera: IMG_0688
I manually counted the pixels between the straight edge and the horizon at 100-pixel increments across the entire image. These gaps were entered into a spreadsheet. This was graphed and a second-order polynomial line fit was applied. The line is clearly curved.
A screenshot of the pixel counting is on the right show here as an example, click on it to see a larger version.
You can also download the full photoshop file after all the pixels have been counted: IMG_0688.psd
Here is the Excel document with the results of the counted pixels: Tommy G gap measured
- The ship on the left is the Color Magic which is 225 meters long.
- The lens is a 10-20mm wide-angle lens, not a fisheye lens.