Since the majority of the users here use Cree XM-L's i thought it would be nice if we could share some information/experiences about the solutions we have when we want to get a tight beam out of this led.
I use this simple web calculator to calculate the angle of the beam:
http://www.csgnetwork.com/righttricalc.html
The best lens that i could find on the internet for this is this one, but i didn't got to test it, they say 3.7° :
http://www.led-tech.de/en/High-Powe...L,-XP-G,-XB-D,-OSLON...--LT-1813_106_122.html
3.7 it's like the scubapro nova 230, whitch is really tight
I have a lense that lens makes a 18° beam so it's no point in pointing to it since it can't be considered tight.
I know that other people from here used the Ahorton aspheric, the 44mm DX aspheric, fresnel lenses.
What results can be expected?
I use this simple web calculator to calculate the angle of the beam:
http://www.csgnetwork.com/righttricalc.html
The best lens that i could find on the internet for this is this one, but i didn't got to test it, they say 3.7° :
http://www.led-tech.de/en/High-Powe...L,-XP-G,-XB-D,-OSLON...--LT-1813_106_122.html
3.7 it's like the scubapro nova 230, whitch is really tight
I have a lense that lens makes a 18° beam so it's no point in pointing to it since it can't be considered tight.
I know that other people from here used the Ahorton aspheric, the 44mm DX aspheric, fresnel lenses.
What results can be expected?