I modded my Acebeam E10 (that I won in the OL build competition last year) with a sliced 519A, some details about the mod in the WDYMT thread: What did you mod today? - #10916 by djozz
Tints in the hotspot:
On lowest mode:
CCT=3530
Duv=–0.040
CRI=96.8
R9=89
On highest mode:
CCT=3700
Duv=–0.0059
CRI=96.0
R9=93
By slicing the LED, how does it affect the amount of blue light under the curve? Does it increase or decrease? I was under the impression that the dome filters out blue wavelength more than red but seems I might be wrong.
I would have to measure a before-slice after-slice spectrum in the same flashlight (or on the bare led) to see that. I have not done that but will think about it when I slice the next one (I’m sure they will be a next one, these are great when sliced )
cd/lm surely will be lower on the 519 than the 219. Now whether or not the cd/w in any given optic is lower or not depends on a few factors, but I bet that will be closer to a wash when running in the 600 lumen range
The dynamic range of a picture is limited unfortunately while beamshots of reflector flashlights have about the maximum dynamic range that you can generate.
So you have choose, either show the edge of the hotspot and spill well and center hotspot overexposed, or show the intensities within the hotspot well and the edge and spill are dark or completely black.
As Jon, I usually choose something in between because that seems to give the most decent representation of a beam that you can catch in one picture.
But if you want to use your camera not for a beamshot but to compare hotspot intensities, indeed the exposure must go way down.