[Leica] A tripod, an M8, and two candles

[pklein at 2alpha.net (Peter Klein)]

My suspicion is that the blue and purple stuff below the flame (around the 
glass) are warm gasses that are giving off IR only, and no visible 
light.  The various RGB sensors "see" the IR, and the camera interprets the 
data as if it were visible light, resulting in a false color.

The purple halos around the flames are probably a combination of the above, 
plus ordinary purple fringing around a high-contrast edge. Plus, the 
fringing may be wider than you'd see on other cameras because the detected 
IR is also slightly out of focus.

--Peter

Somebody(?) wrote:
> > Don't you think it has to be the IR sensitivity? It seems reasonable
> > to me that this effect represents an IR halo around a candle, rendered
> > as purple by the M8.

Brian wrote:
>I do, but someone has been suggesting that these halos were primarily just 
>focus problems, and I wanted to find out whether that is true. I don't 
>think it is true.