Review with X-ray image: Emisar D1S

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stephenk
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Review with X-ray image: Emisar D1S

Disclaimer

The Emisar D1S was purchased from M4DM4X/Neals Deals.
Link: https://m4dm4x.com/neals-deals/

Introduction

The Emisar D1S is the third light from the Emisar brand after the floody pocket rocket D4, and mini-thrower D1. The D1S is a true 18650 thrower, with claimed 1300 lumens and impressive 130,000 candela peak beam intensity. This is double the peak beam intensity of the popular Convoy C8 (which until recently, was one of the better C8 thrower style lights). How does the Emisar compare to other compact throwers?

Packaging

The D1S arrived in a foam lined cardboard box, packaged in another cardboard box for shipping. A sticker on the front of the box denotes the model, colour, and emitter choice. There were no accessories in the packaging – no instructions, no spare O-rings, nada, nothing. This was disappointing as this is fairly standard for lights half the price these days. At least the instructions for the user interface are easily available online.

Construction

The D1S is well constructed. The anodisation is an unusual texture, quite grippy, but attracts dust. The threads were very well lubed.

There is a relatively large head for an 18650 light, required for the impressive peak beam intensity. The Cree XP-L HI emitter was well centred, and the smooth reflector flawless. The head has fins to improve heat handling, and the side switch is below the head. The tail cap can be unscrewed to insert the battery, and the battery tube also screws into the head. As the connections are anodised, unscrewing either of them mechanically locks out the light. If they are not tight, the light will not work.

The light only fits unprotected 18650 batteries. Springs at both ends allow flat top batteries. The light requires around 6A (much less than the 20A-ish Emisar D4), so the high capacity Sanyo/Panasonic NCR18650GA can be used with only around 5% less output than high drain batteries (Sony VTC6, VTC5A, Samsung 30Q). Button top unprotected batteries (66.5mm long) only just fit – I would recommend using flat top unprotected.

Reverse polarity detection has been reported to not prevent damage to batteries – I decided not to test this! Whilst the battery orientation is the usual way around (+ve to head), the lack of instructions or indication increases the risk to flashlight newbies, writing off an 18650.






Note: tailcap is slightly unscrewed in X-ray image. Battery is Sanyo NCR18650GA

User Interface

The Emisar D1S uses RampingIOS v2. This is a fairly simple(ish) eSwitch user interface. Holding the side switch increases, or decreases the brightness. Unlike some ramping interfaces, you need to let go and press again to change direction – this is not an issue. The light will memorise the previously used brightness. A double click will go straight to maximum output, with subsequent double clicks toggling between memory and max.

3 clicks is for battery check, 4 clicks for momentary mode, 6 clicks for lockout, 8 clicks for beacon, 10+ clicks for thermal management. A similar number of clicks is required to exit momentary and lockout modes. I really like the momentary mode, which goes to maximum only the switch is being pressed.

Initial thermal management settings were very conservative, with the light reducing output within 60secs. After re-calibration (10+ clicks, hold until getting too hot to hold – it will flash first before moving to max) thermal management was impressive, with minimal regulation required due to good thermal design if the head.

A strobe mode is an odd omission for this user interface. I’ve used strobe mode on a C8 to successfully move on some annoying wildlife, so it is useful for this type of light. I would also like to have the option of discreet mode levels (as well as ramping) as per NarsilM UI on the BLF Q8, as it allows for a better idea of output and thus prediction of runtime. Whilst other user interfaces can be re-flashed, this requires the necessary equipment and soldering, and is thus only an option for keen flashlight enthusiasts.

Beam, Output, and Runtime

The large head (for a single 18650 light) , smooth reflector, Cree XP-L HI emitter, and relatively high lumens output for size, results in an impressive peak beam intensity for this category of light. My tests matched the claimed 1300 lumens (@30s) and peak beam intensity of 130,000cd with Sony VTC6.

The beam is very similar to the Convoy C8, though with a slightly narrower and more intense hotspot. The beam is very artefact free, and my 1A tint light had a “perfect” pure white tint.

As the light is direct drive, the output will drop gradually as the voltage decreases. Runtime will be variable upon battery used and thermal management. The light blinks and drops brightness at 3V to warn users of impending darkness. There is low voltage protection at 2.8V when the light turns off.


Below whitewall beam shots – (Left) Emisar D1S, (Right) Convoy C8


Outdoor beamshot on 100% output – 3secs, f/5, ISO800.

Conclusion

Things I liked:
Impressive size to peak beam intensity ratio
Impressive size to lumens ratio
Impressive heat handling (after re-calibration)
Good build quality
“Interesting” grippy anodisation
Low voltage warning and protection

Things I didn’t like:
No discreet mode level options
No strobe
No instructions or spare O-rings
Risk of damaging battery if inserted wrong way around (and no polarity indication)
Very conservative heat handling by default (easily re-calibrated)

This is an impressive light in its compact thrower class, with the double the peak beam intensity of 8*7135 C8 lights, and excellent heat handling. I like the ramping user interface, but would like strobe and discreet modes as well.

I’ll also add the the shipping time from China to Australia with Neals Deals was very impressive at just 11 days!

Edited by: stephenk on 11/24/2017 - 22:04
Lexel
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on x-ray the tail cap is not fully screwed down and the springs are very much compressed
are protected cells too long?

[Reviews] Miboxer C4-12, C2-4k+6k, C2, C4 / Astrolux K1, MF01, S42, K01 / BLF Q8 / Kalrus G35, XT11GT / Nitefox UT20 / Sofirn SF36, SP35 / Imalent DM21TW / Wuben I333 / Ravemen PR1200 / CL06 lantern / Xanes headlamp

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stephenk
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Lexel wrote:
on x-ray the tail cap is not fully screwed down and the springs are very much compressed
are protected cells too long?

The tailcap was only unscrewed as the light was locked out, and forgot to screw it back for the x-ray image.
The maximum cell length permitted is 67mm which realistically means that only unprotected cells are allowed in this light.
The springs are very compressed even with 65.2mm batteries such as the GA (in the image).
I could fit a button top added VTC6 at 66.5mm.
anycolourfloyd
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I too would like to see discreet mode levels so that runtime is known.

mattlward
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Is not mode options one of the programmable features? It is on the D1, have tried it myself and like the ramp better.

EDC rotation:
Convoy S2+, 6*7135, XM-L2 3D, 10 degree TIR, PilotDog lighted tailcap.
Convoy S2+, H17F, XM-L2 4C, lighted tailcap
Zebralight SC52w-L2
Olight S1A
Olight S1R

stephenk
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mattlward wrote:
Is not mode options one of the programmable features? It is on the D1, have tried it myself and like the ramp better.
As far as I’m aware there are no discreet modes on any Emisar lights unless you re-flash.
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Oops, didn’t see this review until you shared the link elsewhere. How did you get the x-ray image?

Some of the things on your “didn’t like” list are already fixed in newer firmware, but I don’t know if/when Hank will use it. Perhaps it’ll happen eventually (particularly if I finally update its thermal code again).

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Thanks stephen for another fine review. Do you have any way to measure the drain on the battery when switched off?
Edit. It appears the deals off.

My current and or voltage measurements are only relevent to anything that I measure.

Budget light hobby proudly sponsored by my Mastercard and unknowingly paid for by a hard working wife. 

djozz said "it came with chinese lettering that is chinese to me".

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.

 

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ToyKeeper wrote:
Oops, didn’t see this review until you shared the link elsewhere. How did you get the x-ray image?

Some of the things on your “didn’t like” list are already fixed in newer firmware, but I don’t know if/when Hank will use it. Perhaps it’ll happen eventually (particularly if I finally update its thermal code again).

Thanks for the update. I used a medical x-ray unit (I have to sometimes test, so might as well have a flashlight in the beam).

MRsDNF wrote:
Thanks stephen for another fine review. Do you have any way to measure the drain on the battery when switched off?
Edit. It appears the deals off.

I don’t unfortunately. I always mechanically lock out my lights anyway.
Which deals off?

Another photo taken last night. f/5, 3secs, ISO800. Cameo appearances from 2xConvoy S2+ and Thorfire TK15S.

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Love that X-Ray image! Shows the correlation between all the parts, even the junction of threads, really cool seeing that without having to be a cut-away.

Nice work!

Dale

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thanks for this different review.

Do you plan to make beamshots? What’s 130kcd worth in feet?

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stephenk wrote:
Which deals off?

The link in the OP doesn’t show the light.

My current and or voltage measurements are only relevent to anything that I measure.

Budget light hobby proudly sponsored by my Mastercard and unknowingly paid for by a hard working wife. 

djozz said "it came with chinese lettering that is chinese to me".

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.

 

netprince
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Great review… +1 for the xray image, those are awesome.

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stephenk wrote:
MRsDNF wrote:
Do you have any way to measure the drain on the battery when switched off?

I don’t unfortunately. I always mechanically lock out my lights anyway.

Standby drain should be lower than the cell’s self-discharge rate. I measure 21 uA on mine, or about 16 years of standby time per charge.

After I’ve reflashed with different code and fuses, I measure 0.31 uA, or about 1100 years of standby time per charge.

I generally use mechanical lockout on the stock firmware because I don’t like clicking six times and then waiting for two slow flashes… but after reflashing I use soft lockout instead (4 clicks and a single fast blink).

stephenk
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wdkingery wrote:
thanks for this different review.

Do you plan to make beamshots? What’s 130kcd worth in feet?


I have a nearby open space with 220m clearance. Unfortunately the my last two attempts of using that space were thwarted for various reasons (flood and people rugby training in the pitch black). So hopefully sometime soon I’ll have a longer distance shot. Given that my L6 has a useable beam (as in being able to discern objects) for around 200m, I would expect the beam to be useable for over 250m.
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Thanks TK.

My current and or voltage measurements are only relevent to anything that I measure.

Budget light hobby proudly sponsored by my Mastercard and unknowingly paid for by a hard working wife. 

djozz said "it came with chinese lettering that is chinese to me".

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.

 

Thetasigma
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wdkingery wrote:
thanks for this different review.

Do you plan to make beamshots? What’s 130kcd worth in feet?

That depends on how much light you want on the target, I like about 1 lux on my target to be able to actually see it, so about 350 yards or 1050 feet. Real world experience seems to bear that out for me.

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ToyKeeper wrote:
Oops, didn’t see this review until you shared the link elsewhere. How did you get the x-ray image?

Some of the things on your “didn’t like” list are already fixed in newer firmware, but I don’t know if/when Hank will use it. Perhaps it’ll happen eventually (particularly if I finally update its thermal code again).

I really hope that Hank adopts your new firmware! That’s one of the things that’s keeping me from getting an Emisar now, but sooner or later I’m bound to cave in.

(I know I could reflash, but I’d prefer not to until I’ve practiced a bit on other lights.)

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I got my D1s today , I really like the new grippy finish.

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MRsDNF wrote:
stephenk wrote:
Which deals off?

The link in the OP doesn’t show the light.

That’s because you have to login to M4DM4X to get the product page.
MRsDNF
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Thanks stephen. The dumb mooses reputation is intact. Silly

My current and or voltage measurements are only relevent to anything that I measure.

Budget light hobby proudly sponsored by my Mastercard and unknowingly paid for by a hard working wife. 

djozz said "it came with chinese lettering that is chinese to me".

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.