ven
Flashaholic
I would have thought the depth helps focus the LED in the reflector, surely if it was not important to have a deep(and wide) reflector, all reflectors would be shallow to be more compact.
If more light is focused into the hot spot(all things same other than reflector depth), surely the intensity would be greater in the hot spot. 3" wide reflector, one reflector 2" deep, other reflector 6" deep. The 6" deep reflector would surely the light into the hotspot(tighter/smaller) making it more intense due to less loss(spill).
Please read my post above.
The depth of a reflector is not relevant for throw, only the diameter.
Adding a lens to a reflector will not increase throw, it will at best decrease it slightly (because of lens transmission losses), but probably decrease it by a lot.
Large reflectors can be made cheaply. The BLF GT a 118mm diameter reflector and only costs 111-200$!
Also the Maxabeam is not made out of silver and does not produce 6000 lumens when defocused (more like 1500). :thinking:
But it's true...
The calculation I posted above (post 13) shows this. You can actually calculate the throw if you know all the details. You would be amazed how accurate it is.
Now just try to think about the equation. Think about how the depth of the reflector will influence it.
Imagine that you are shining the flashlight around outside. Now imagine that you are standing where the hotspot is and are looking straight at the flashlight. What do you see? You see a glowing circle, i.e. the reflector reflecting the light of the LED (and also the LED ittself) into your eyes. You cannot really see how deep the reflector is (for a given diameter). So why should it make a difference?
Remembering my 60" Carbon Arc as best as I can, the 60" reflector had a maximum depth of about 9"-12", so pretty shallow I'd say. But obviously it threw like no tomorrow.
Matt from Peakbeam Systems posted on one of the Maxabeam threads recently and I'll try to find it but IIRC, maximum Lumens from the latest gen3 MB is about 1,300 Out The Front.
http://www.candlepowerforums.com/vb...eam-question&p=5053478&viewfull=1#post5053478
Yes. They significantly reduced the lumens to get more throw, version I spoke of wasn't even short arc and I was wrong, the 6k lumen version had 1m candela, not 12.
Also short arc is completely different than LED
The deeper it is the less you have waisted wash light, ditto for not having a lenses.
Remembering my 60" Carbon Arc as best as I can, the 60" reflector had a maximum depth of about 9"-12", so pretty shallow I'd say. But obviously it threw like no tomorrow.
Matt from Peakbeam Systems posted on one of the Maxabeam threads recently and I'll try to find it but IIRC, maximum Lumens from the latest gen3 MB is about 1,300 Out The Front.
http://www.candlepowerforums.com/vb...eam-question&p=5053478&viewfull=1#post5053478
Yes. They significantly reduced the lumens to get more throw, version I spoke of wasn't even short arc and I was wrong, the 6k lumen version had 1m candela, not 12.
Also short arc is completely different than LED
optically.... its not possible ruling a monstrously heavy aspheric, you'll simply need a bigger reflector, but there's a practical limit with that.