Distribution of peak R-magnitudes of sporadic meteors from the CAMO influx camera (histogram) and the gamma distribution fit (blue line is the main fit, black lines are all Monte Carlo runs). The jaggedness of the histogram is due to the limited precision of the magnitudes in the data file. The yellow shaded area around the inflection point represents the uncertainty in the inflection point location, and the green shaded area the uncertainty around the reference point.