qwertyydude
Flashlight Enthusiast
- Joined
- Aug 10, 2008
- Messages
- 1,115
I just received my Romisen RC-C8. Suffice to say it is a decent light. Focuses down rather nicely but what I really want is a mini DEFT. Here's my little invention. I happen to be a little bit of a photog. And sadly the days of film are long since past. I originally started in photography in high school, not too long ago. High school class of '01. My camera was an old hand me down my dad gave me. A Canon F1. It had a very nice and quite fast Canon FD 50mm F1.4 lens.
And experimenting with it I knew it could throw a perfect collimated beam being it is multi-coated, multi element, top grade camera optics. So after a little bit of experimenting I noticed that the RC-C8's head without the retaining ring just happened to fit in the back of the lens. Only problem was the lens needed to be held further out. So I had a perfect solution, a canon life size macro adapter ring. This also means I can attach a different lens if I want too. Longer lenses collimate tighter but I doubt I really want a tighter beam than this. So without further ado. My Optical WMD, the final word when it comes to precision optical performance.
This is the complete light assembly, the bezel, lens, and retaining ring is removed. The lense is focused to infinity to make the internal element as close to the led as possible. The light still twist focuses but no longer can go to a flood. This is pure thrower now.
Here's the interchangeable lens feature, the adapter happens to fit snugly so only a small layer of goop is needed to hold it on.
Here's a stoppered down -4ev exposure of the HS-802 at 6 feet. My R2 HS-802 running at 1.5 amps has been clocked at 32,000 lux at 1 meter so it's nice and comparable to the Deree DBS. Plenty of throw. My Optical WMD clocked in at a respectable 40,000 lux at 1 meter, keep in mind this is only driving the led at about 750 ma. But optics work kinda funny because this focuses a beam so tight there is almost no light loss due to scattering, aberration losses, or internal reflection. This is after all a high quality camera optical system. And a 2 degree beam ensure the light stays collimated for quite some distance. This behaves almost almost like a laser in that the total brightness of the spot is almost not related to the distance from the source. So the further you get, the brighter the hot spot gets relative to my already great performing HS-802.
Here's a really fun pic.
It's a true searchlight the beam is visible and this was a clear cool and dry night with an 8 mile visibility so seeing a beam this well defined is a testament to the beam quality of this light. Earlier there were clouds in the sky and I could actually project the square led die on them, I could almost make out the bond wires! The end of that beam is easily 1000 feet away.
Oh and check ebay because if you wanna build one of your own you can get the lens for about $50 and the adapter for about $20.
And experimenting with it I knew it could throw a perfect collimated beam being it is multi-coated, multi element, top grade camera optics. So after a little bit of experimenting I noticed that the RC-C8's head without the retaining ring just happened to fit in the back of the lens. Only problem was the lens needed to be held further out. So I had a perfect solution, a canon life size macro adapter ring. This also means I can attach a different lens if I want too. Longer lenses collimate tighter but I doubt I really want a tighter beam than this. So without further ado. My Optical WMD, the final word when it comes to precision optical performance.
This is the complete light assembly, the bezel, lens, and retaining ring is removed. The lense is focused to infinity to make the internal element as close to the led as possible. The light still twist focuses but no longer can go to a flood. This is pure thrower now.
Here's the interchangeable lens feature, the adapter happens to fit snugly so only a small layer of goop is needed to hold it on.
Here's a stoppered down -4ev exposure of the HS-802 at 6 feet. My R2 HS-802 running at 1.5 amps has been clocked at 32,000 lux at 1 meter so it's nice and comparable to the Deree DBS. Plenty of throw. My Optical WMD clocked in at a respectable 40,000 lux at 1 meter, keep in mind this is only driving the led at about 750 ma. But optics work kinda funny because this focuses a beam so tight there is almost no light loss due to scattering, aberration losses, or internal reflection. This is after all a high quality camera optical system. And a 2 degree beam ensure the light stays collimated for quite some distance. This behaves almost almost like a laser in that the total brightness of the spot is almost not related to the distance from the source. So the further you get, the brighter the hot spot gets relative to my already great performing HS-802.
Here's a really fun pic.
It's a true searchlight the beam is visible and this was a clear cool and dry night with an 8 mile visibility so seeing a beam this well defined is a testament to the beam quality of this light. Earlier there were clouds in the sky and I could actually project the square led die on them, I could almost make out the bond wires! The end of that beam is easily 1000 feet away.
Oh and check ebay because if you wanna build one of your own you can get the lens for about $50 and the adapter for about $20.
