Manta Ray D750 - XML T6 underwater light with side stepless switch

A few days ago I found an underwater light with side step-less slide switch. Can't seem to find any additional info on it.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170635354639




Manta Ray D750 XM-L T6 Underwater Flashlight

Combo content

- Manta Ray D750 T6 Underwater flashlight x 1
- Lanyard x 1

Key Features

- Featuring High intensity CREE T6 LED (max 750 lumen)
- Orange peel Aluminum reflector
- Sliding stepless brightness control 0 - 750 Lumen
- Diving Light Design; Underwater 75M tested
- Strongly Built using High quality 6061T Aluminum
- Use 2 x 18650 3.7v Battery (Not Included)
- Runtime : 2400mAh / 90 min

Specification

- Weight : 245g (without battery)
- Length: 21 cm
- Diameter: 5 cm (Bezel end) / 3cm (Button end)

I just can't see how such a sliding switch like that one could be w/tight to 75m.

Most dive lights use the Hall Effect. There is no physical link between the button, or in many cases ring, on the outside and the electronics on the inside. Instead the slider in this case will contain a magnet which will have and influence on a coil on the inside.

I hope that makes sense.

Ah.......I see

I had assumed d/lights would use a rubber boot.

It seems that the Manta Ray D750 host gor updated

Looks like similar to XTAR D01. At least the switch.

Too Bad, I am looking for a light in that range for diving.

Lol. Looks like an o-ring. At least the XTAR D01/6 have a lens retaining ring that screws down.

Agree that the sliding switch looks similar. (I bet its the same!)

Manafont sells one just like the Manta Ray D750. LINK

This has the head screwing down. Whether the o-ring is effective or not depends on what the o-ring is against. If it is in laying in a groove cut into a ledge then this design may be fine. Water pressure pushes against the glass compressing the o-ring which pushes back against the glass.

If it is an o-ring with the glass behind it and nothing else then it's going to leak of course. I have one dive light that has one o-ring on top of the lens (from the outside), one around the outer edge of the glass and another under the glass.

There are many different o-ring systems that work (and some that don't) :)

The main concern I would have with this light is that it would be too floody for a dive light under any conditions other than clear unlimited visibility waters. The head is only about 44 mm it looks like. I have a 52 mm head used with a MC-E and it works pretty well.

If someone buys this light a dive report would be welcome :)

I just ordered one from Manafont. Will report back.

Just received the light. Few quick facts:

It's quite small.

The switch is stepless while the light intensity isn't but it has plenty of steps.

Tail current is 1.5A on high and 0,15mA on off.

A small twist of a tail cap disconnects the current.

The battery tube has double O-rings on both sides.

I examined the head and I don't see how to disasemle it.

Please keep the information coming.

Some more observations:

The light has more than 10 intensities. Switching it on to full seems seamless.

The tail seems to be twistie. I haven't been able to get any contact between tail spring and tail cap.

The lowest mode is 0,025A high is 1,5A

The switch is plastic

Pictures:

Thanks for the pics. According to XTAR customer support this torch is made in XTAR's former co-factory. I asked why they separated from the manufacturer and a vague comment about quality was made.

Anyhoo, the torch probably uses the same electronics as the Xtar D01 designed for a XP-G R5 LED. The specs match the D01 and XTAR has just released an extension tube for allowing the use of a second 18650 cell. This torch obviously has a buck driver which can handle the additional voltage whereas the D06 (XM-L version) does not and can not use the extension tube. The light head design seems similar to the D01 also.

The D06 seems to be driven at 2A. I asked if it could be driven harder and they mentioned that the insides would overheat.