[UNOFFICIAL CONCEPT] Emisar D7: single or dual channels, individually swappable S2+ optics, 26800 battery tube

Whats the diameter of an S2 (S2+) optic? Ive never owned one. I don't know if it would save space, but Yajiamei on Alixexpress sells many 17mm optics with different beam profiles, and they're excellent quality. Doing quick math, "in a perfect world" if 17mm optics were used it seems the head could be about 58mm wide, but that would still be 6mm larger than the K9.3..

It is a nice design. I would be curious to see a beam profile from head design like this as there is not anything else on the market to compare it to (thats a good thing!). I always wonder how companies (especially smaller ones like Emisar) engineer and design for beam convergence when designing a new FL head, especially using a unique and original optic layout (like the dm1.12, for example).

I have to wonder what the beam shape would look like from the (4) clear optics in your rendering, regarding how they are place (a "Y" shape). Would it have a round hotspot? I don't know, just questions that come to mind. Is building a prototype the only way to discover this? Im sure there are programs that account for optic spacing, optic beam angle/shift, convergence, etc.

EDIT: Oh, and dont we think this would likely be a Noctigon branded product? I mean, based off the other large head, multi-optic lights Hank has already made. Just for consistency and all. It used to be Noctigon = CC drivers and Emisar = FET Hotrods, but those "lines" started disappearing once he started putting the KR4 drivers in the D4v2.

S2+ optics are 20mm. Those 17mm optics would work fine too and allow for a smaller head, but I like the larger head for better thermals and the larger optics for a little more throw out of the narrow ones.

So long as all the optics are pointed in the same direction their beams will converge into one round hotspot. The flat glass lens over the front would take care of making sure all the optics are aligned.

It could be Noctigon branded but I picked Emisar because I like compatibility with D4SV2’s battery tube. I don’t think there’s any rhyme or reason to his Noctigon/Emisar name choices.

Yea better thermals are always... better. lol. Ans if the 17mm optic cannot get the head size small enough to use the k9.3 head then there is not really a reason to go smaller - i like the idea of larger optics for better throw.

Makes sense why you picked Emisar, given the D4sv2 tube. But, there used to be a rhyme and reason why there were 2 brands (Noctigon started as parts i believe - mcpcb's, springs, drivers, etc). Then the Meteor, K1, KR4, KR1 came out as Noctigon and were the only lights he offered with Constant Current / "regulated" drivers. Emisar D1, D4, D4s, etc.. were FET 3+1 drivers. Even 2 years ago there was a clear distinction between the two brands. Now it's a little less cut and dry, if you will.

Would reflectors from S2+ also fit or just the tir lenses?

The reflectors will not fit because they would touch components on the aux PCB. I suppose the design could be modified to fit them, but I’d rather stick with TIR’s because they play nicer with aux LED’s.

Really impressive drawings grizzly, Amazing what you can do in your free time.

What problems does this design solve compared to the dm1.12, k9.3, or dual channel d4sv2?

If someone wants an ultrawarm/pink night light, they could spec the k9.3 with e21a 2000k and deep red.
If someone wants flood/throw, they can go with dm1.12 or d4s.
If someone wants tint ramping, they could go with d4s or dt8.

The only improvement I see is for UV use, where raising the height of the main glass, and adding a fixing collar would enable individual zwb2 filters. Maybe that would be a middle ground between uv mule on k9.3 and those modded l21a s. Linear driver isn’t ideal for that though.

I feel like Hank’s midsize lineup already covers a lot of bases. Stuff bigger than the dm1.12 and smaller than d4 needs some love. Surprised there is no boost or dual channel d18, or 26800 tube for k1. Heck, if we want to use s2+ optics, maybe a 14500 light would make sense (like an fw1aa with a slightly bigger head).

The point of the above is that proposing part reuse is tempting, but it still takes design effort to bring to market. Maybe that design effort would be better spent on holes in the lineup.

However, if there is something that this design could uniquely accomplish, then I’d change my mind.

I believe what this design uniquely accomplishes is allowing the user to adjust the beam profile on a per-LED level by changing the optics.

Take D4SV2 for example. In a flood/throw dual channel configuration we are limited to using the throw optic and throwy LED’s to achieve throw. It’s easy enough to use floody LED’s and DC-Fix for flood. D4V2 also can only get so throwy with it’s relatively small optics. With these larger S2+ optics, more throw could be achieved on one channel while also achieving wider flood on the other channel, without having to be particular about LED selection to control beam angle.

K9.3 has the same problem, being limited to relatively floody optics due to their small size.

Take DM1.12 next. The user is limited to a very throwy center optic and very floody outer optics. It also uses nearly twice as many LED’s which adds a lot of cost. With this design, the user can choose to mix whatever LED’s & optics they please to achieve the beam profile they want.

This design also has more thermal mass than DM1.12, K9.3, or DM1.12 for higher sustained output.

I was just thinking last night while playing with my new D4SV2’s that It would be nice to have a single optic with 2xflood and 2xthrow.
Maybe with some care and attention I could sand two of the optics on my lense.-

Edit: Hm, I kinda changed my mind about how relevant I thought this comment was. But people dont like posts being deleted so… I tried to strike through it, but it doesnt seem to want to work for some reason.

I did exactly that on my D4SV2, I covered two of the little optic cone fronts with masking tape circled and then sanded the rest of it with 400 grit sandpaper and it works ok.

That is one sweet render and it looks perfectly sized with a 26800 cell.

There could be a stamped out / machined front piece to align the optics like in the M43 meteor made out of polycarbonate.

4 throw & 3 flood would also be my ideal setup.

I think it would be really great if the company that made them could just make a combo optic.

Yeah! It’s in there, it’s frosted plastic just like K9.3. It doesn’t show up well in the renders but it’s there.

I would be more happy with a single emitter 18650 Hank with either an S2 size tir or small reflector. Something more pocketable than a KR1.

7 - SBT90.2s….for a flash bulb. :smiley:

What about a smaller 4.2 version. With 3 separate optics, a quad and 2 singles, but the same concept of being swappable.

For that many emitters, you might as well lean in to the old Maglite concept and go with a 2 x 26800 design, with an optional 3x26800 tube for those that want to fully embrace tradition and enjoy walking around with ~21,000mah of cells and 7 eye melting emitters.

That would be great. It would make the light much more expensive though, requiring a new beefy buck driver to be designed. One of my goals with this design was to use as many existing parts as possible (like DM1.12’s driver) to keep cost down.

Look at the advantages - Hank would finally have something (other than the K1) to compete in the medium/large format light space, and that something would have Hank’s trademark nature of being wildly customizable.

Im on board with this.

Basically If Hank could "bring back" the D1, but make it a 14500 light. That would be great.