Hi everyone,
I’m from UltraFire, and we’re currently looking for BLF members who may be interested in reviewing a dedicated diving flashlight.
The model is UltraFire UF-DIV13S Diving Flashlight, designed specifically for underwater use rather than general-purpose lights. If anyone here is into diving, underwater photography, or technical flashlight testing, we’d really appreciate your feedback.
Key specs at a glance:
Max output: 3350 lumens
Beam distance: 300 meters (22,500 cd)
Waterproof rating: IPX8, tested for 100 m dive depth
Light modes: 3-step magnetic rotary switch
Low: 500 lm
Medium: 1500 lm
High: 3350 lm
Switch: Magnetic rotary switch (no mechanical buttons, glove-friendly)
Battery: 21700 rechargeable (included)
Charging: USB-C on the battery
Construction:
CNC-machined aircraft-grade aluminum body
Stainless steel bezel (impact & corrosion resistant)
Dual O-ring sealing + pressure relief valve
Saltwater ready, designed for rocky dive environments
Includes dive wrist lanyard and adjustable hand strap
If you’re interested, please feel free to reply here or send me a PM.
Thanks for your time, and I appreciate the knowledge shared in this community.
Best regards,
UltraFire
Hi Ultrafire! I know your post is a couple months old now, but I wanted to reach out. I am a professional photographer, scuba instructor, night specialty instructor and (basic) technical diver.
The DIV13S sounds great, with a good form factor and fantastic brightness…
But…
But it has a magnetic rotary switch. This is an awful design that I can never recommend for two reasons:
- It is only suitable for blue water diving, and some dive sites.
Anywhere near / with ferrous sand (volcanic black, iron-rich sand, like most of Indonesia and Philippines, for example), this switch gets small grains of sand stuck inside, where it is impossible to clean out without somehow dismantling the torch after every dive, and being VERY thorough. Every time you rotate the switch, the magnetised sand grinds away at it.
- it has a rotary switch, which is terribly difficult to operate one-handed.
Yes, easy with two, but not with one. For photography and emergencies, you need to be able to operate your lights with one hand quickly and easily. For this reason, I only use side push-button torches or slide switches (and I don’t use slides any more due to reason #1 above).
Again, for switches: no rotary, no slide, no tail-mounted buttons and no twist on-off.
(I regularly use Archon, Supe, Asafee and Sofirn lights at the moment)
