Halo around convoy s2+ sst40 nw normal?

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Bearbreeder
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Halo around convoy s2+ sst40 nw normal?

Seem to have a halo around the beam of my convoy s2+ sst40 on higher modes especially.

Is this normal?

Thanks

Edited by: Bearbreeder on 10/18/2019 - 17:26
BurningPlayd0h
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Yes, it’s due to the anti-reflective coating on the lens. Almost any AR coated light will have it (unless the bezel is tall enough to block it from shining out).

Bearbreeder
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BurningPlayd0h wrote:
Yes, it’s due to the anti-reflective coating on the lens. Almost any AR coated light will have it (unless the bezel is tall enough to block it from shining out).

Funny how it doesn’t show up on any of the beamshots of sponsored reviews …

Hmmmm

This isnt just some extra spill but an actual purple halo around the beam

Who needs to worry about tint when theres are very visible purple artifacts Silly

chops728
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I find the S2 has Halo effects around most LEDs — especially the bigger die LEDs —- it’s funny how some jump out at you and others are barely noticeable—Eagtac have the biggest problem I’ve found —Also stainless bezels

fluke
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My S2+SST40 6500K is the same.

Bearbreeder
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Interesting that my blf a6 se which is supposed to have AR glass doesnt have any halo

Hmmmmm Innocent

trailhunter
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You didnt trust the reddit feedback? Smile

Bearbreeder
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trailhunter wrote:
You didnt trust the reddit feedback? Smile

Reddit seems to be RAH RAH RAH BUY THE FW3A (or latest flavor) even if there plenty of folks with problems …

Just amazed that everyone thinks its OK and no one seems to point it out in reviews

Its so obvious that even my craappy iphone camera can capture it walking outside on the street … so not just a “white wall” thing Innocent

Outside on the side of the house … cant conplain about CRI or tints if you see this while working outside at night

chops728
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Put a piece of DC Fix on the lens —- will loose throw but fix that ugly ring

Jack Kellar
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Being bothered by this is white wall hunting at its finest Evil I have this ring on my Nichia S2+ and my XM-L2 S2, and it doesn’t affect their utility in the slightest.

Bearbreeder
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Jack Kellar wrote:
Being bothered by this is white wall hunting at its finest Evil I have this ring on my Nichia S2+ and my XM-L2 S2, and it doesn’t affect their utility in the slightest.

Aint no white wall on this

Or should we paraphrase “bothered by tints, cri or pwm is whinning at its finest when it doesnt affect their utility” when the big bad barney the purple dino halo ring is hugging your light Innocent

Why none of these reviewers mention it or a ring that i can easily capture on my iphone camera doesnt show up on THEIR white wall beam shots is beyond me

Nooner
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I have no comment.

I just hope this thread keeps going because it puts a smile on my face.

Nooner
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I just realized I do have a comment.

Halogate.

e1000
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SammysHP
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I can give you a shipping address to dispose the flashlight if you want.

Bearbreeder
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SammysHP wrote:
I can give you a shipping address to dispose the flashlight if you want.

Not a chance, im going to shine it on folks to make em seem like they are religious figures with that halo Innocent

Great for night church sermons !!!

A special convoy s2+ feature … instant jesus


!

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@Bearbreeder, that’s a constant complaint about the SST-40, exasperated by the low CCT and low CRI of the SST-40.

The SST-20 4000k is much better in this regard.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

Bearbreeder
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BlueSwordM wrote:
@Bearbreeder, that’s a constant complaint about the SST-40, exasperated by the low CCT and low CRI of the SST-40.

The SST-20 4000k is much better in this regard.

Thats interesting as we have folks here and on reddit who seem to have the same issue on the s2+ with sst20, nichia, xml, etc …

Perhaps not purple but pink, red, etc …

Its not just AR lenses as my fenix and blf a6 with em dont have this issue

What amazes me is not that its there, its a cheap light afterall

But that ALL the reviewers seem to miss it while they go off about tint, cri and pwm

Its the more obvious than any of those on mine Innocent

polarweis
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get the OP reflector if rings bother you. s2+ with sst20 and OP. no rings and perfect hotspot.

"It wouldn’t be so bright if there wasn’t a shadow every once in a while." - Jason Mraz

Bearbreeder
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Whats “bothering” is the absolute lack of mention of this in reviews

Are reviewers getting set “special” samples, are their cameras not able to capture what an iphone camera can, or is it something else …

How can one be a tint snob and not see a big halo? Innocent

Rayoui
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My D80v2 with SST40 has a similar distinct blue/violet ring around the periphery of the beam. It’s noticeable but in no way affects the usefulness of the light. It resides outside the useful area of the beam and isn’t a problem in actual use.

In practice, it doesn’t really affect tint/CRI since it lands far outside the usable light pattern.

For what it’s worth, I have an S2+ with a 219c which does not have any visible blue artifacts around the beam.

Bearbreeder
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Pretty noticeable on even a brown fence

Might not be in the beam itself but its well in direct view of your eyes

Its amazing that reviewers dont seem to even mention it when they go gaga over every other thing Wink

Rayoui
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I guess we don’t see it mentioned because it doesn’t really affect the performance of the light. If it was right around the hotspot we’d probably see many people complaining about it. It’s far enough out that it’s easy to just ignore it.

If it really bothers you, perhaps you could try a different reflector/optic or perhaps a non-AR coated glass window. If that doesn’t help, consider a different emitter.

Omega_17
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Its because the reflector shape is not perfectly optimized for the LED. If you want a clean hotspot you need to use TIR lens. But it will be less bright.

Bearbreeder
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And yet it doesnt even show up on white wall beam shots of reviewers … where it easily shows up even outdoors on mine

And big purple halo is like barney the purple dino stalking you Wink

Looks like the BLF A6 has the proper reflector, it is AR lens

Compare to the s2+ sst40

Hes coming for me !!!!

freeme
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+1 wink

Rayoui wrote:
If it really bothers you, perhaps you could try a different reflector/optic or perhaps a non-AR coated glass window. If that doesn't help, consider a different emitter.

 

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Bearbreeder
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Heres whats very interesting … no purple halo, and a good reviewer would have mentioned it

Blf a6 .. no purple halo

Convoy sst40 s2+ … pretty obvious on a beam shot, no sense whining bout tints or cri with that thing around

And …

Cythras
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I’m pretty sure reviewers don’t mention it because it doesn’t effect the usability of the light like tint, CRI or PWM may. Nobody uses the uses the area outside of the useful spill of a light to do anything. At any rate, the halo is from a combination of AR glass and the bezel of the light.

Blue Convoy S2, No AR glass. Deep blue halo like yours. Green halo from very thick GITD Oring.

Green S2+, AR Glass, TIR (Triple). Green halo

Purple S2+, AR Glass. Huge purple halo

Black S2+, No AR glass. No halo

Desert Tan S2+, AR glass. Brownish-orange halo, pretty faint.

Silver S2+, AR glass. Bright blue/purple halo.

Rayoui
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Thanks for posting these. I’ve never seen the effect of bezel color demonstrated so clearly.

The way the S2+ bezel is chamfered probably exacerbates the effect because of the angle the incident light is striking it.

Bearbreeder
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Interesting thanks for the pics … as someone said above the s2+ seems quite susceptible to these issues, you might get the same color halo as yr light !!!

Interesting that the BLF A6 with AR which is probably the most similar light in price, form and function doesnt have the halo in practical use, though you can see a bit of color with the same type of shot as above. Seems like the blackbezel helps

Compare to s2+ SST40

As to if it “matters” … well thats up to the end user perhaps not flashaholics who go off about a slightly off tint or slightly low CRI

BLF A6, roughly half beam shot, so well within the field of direct view… just fine

Same shot SST40 … well look at that purple ring right in the field of vision

Methinks that the average user or muggle if one wants to feel better, would notice that first before any small tint or CRI differences

But then it doesnt seem important for reviewers to even say a quick word or two about it …

Hmmmmm

Rayoui
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I don’t think muggles really care too much about rings in the beam. Ever used a Maglite? Wink

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