Looking for a dive light with a very narrow beam

4 posts / 0 new
Last post
Barmaglot
Offline
Last seen: 1 month 3 weeks ago
Joined: 04/23/2017 - 05:22
Posts: 4
Location: Israel
Looking for a dive light with a very narrow beam

I went on a couple of blackwater dives recently, and was very impressed with Inon LF800-N dive light. It’s got a Fresnel lens that tightens the beam to some 5 degrees and completely eliminates falloff. The guy who was using it was swinging it around, and it looked like a lightsabre – just this long, solid beam of light, cutting through all the particulate matter in the water, finding the critters to photograph without blinding the user with backscatter from a diffuse beam. I am not, however, impressed with its $250 price tag. Are there any cheaper lights that follow the same design pattern?

xtarflashlight
xtarflashlight's picture
Offline
Last seen: 14 hours 23 min ago
Joined: 01/21/2013 - 21:25
Posts: 163
Location: Shenzhen

Based on your requirements, you may be interested in xtar D26 1100, max output 1100lm, spot light angle 5°:
https://www.xtar.cc/product/XTAR-WHALE-D26-L2-U3-(Switch-upgrade)-Diving-Flashlight-38.html

Barmaglot
Offline
Last seen: 1 month 3 weeks ago
Joined: 04/23/2017 - 05:22
Posts: 4
Location: Israel

Thank you, that model does look interesting, although checking reviews, it does appear to have significant sidelobes on its main beam. The primary feature of the Inon LF800-N is that in addition to a reflector, it uses a condenser lens in front of the LED, producing a sharply defined beam with nothing along its sides. The fall-off produced by more common pure reflector designs can illuminate a lot of particles when diving in black water, which will obscure targets picked up by the core beam.

Enderman
Enderman's picture
Offline
Last seen: 53 min 20 sec ago
Joined: 11/03/2016 - 22:42
Posts: 4271
Location: Vancouver, Canada

xtarflashlight wrote:
Based on your requirements, you may be interested in xtar D26 1100, max output 1100lm, spot light angle 5°:
https://www.xtar.cc/product/XTAR-WHALE-D26-L2-U3-(Switch-upgrade)-Diving-Flashlight-38.html

That’s a reflector flashlight, it has neither a tight beam nor a sharp cutoff.
OP is looking for a lens/TIR dive light.