Monday, August 13, 2007

THE GLOW ... explained

So really no >Aura<> photography here. Let's have a look at what happens here. Again my favourate target has been used, a Mexican Zinna. First a shot directly from the camera, now using a f1.3 75mm old Xray lens.

So what do we see here now? Obviously a mix of UV, visible and IR light. But what produces that halo around that flower? Let's look at the RGB channels to find an answer.

While the green channel seems to have mainly recorded the visible light, since that was the flower part I had focused on....

the red channel seems to have captured some IR and some UV, since the point of sharp focus is quite in the back:

And finally the blue channel seems to have mainly recorded UV light, since the focus also lies way in the back and the center seems to be quite blurred (due to the large aperture used). The UV pattern of the flower gets clearly visible since the tips have strong UV reflectance.

Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site>