TIR Lenses for Convoy S2+ with LH351D led

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JBAlvarez
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TIR Lenses for Convoy S2+ with LH351D led

Hi all.

I have been trying to find a comparison between TIR lenses on this well known flashlight, but I could not find any specific.

I love my S2+ with LH351D led, and I would like to try different lenses / reflectors, to search for my personal “perfect” hotspot pattern.

I have tried the smooth reflector included in the S2+ by default, and now I have purchased in Simon store the Orange Peel reflector, it will arrive in some weeks.

Simon sells TIR flat lenses, TIR lenses with matte surface, and TIR lenses with bead surface, all of them with different degrees. Have you tried theses TIR lenses? Please share with me your photos and comments, all experiences are welcome.

Thanks in advance, greetings from Germany.

mitsuki08
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Not exactly the same emitter though but might be useful to you. https://budgetlightforum.com/node/56424

JBAlvarez
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HI Mitsuki08.

Yes, thanks, very helpful. In fact I have been reading here and there, and there are other experiences explained on the web… but I was trying to find something very specific for the LH351D and the Convoy S2+.

My concern is, as optics are very specific, the LH351D dome can interfere with the different TIR configurations that are available, and create a non-desirable hotspot pattern with the S2+.

In any case, I assume Simon has already played / tested them, and for this reason he is selling them for the S2+ in his store. I will buy some of them, and try.

But… which is the one that better fits my preferences? Maybe someone has already purchase them, and can help with beam photos, they are all welcome.

Thanks again!

Azirine
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Hi I’m also interested in this. Have you tried different optics in S2+ LH351D? Which ones do you like?

JBAlvarez wrote:
HI Mitsuki08.

Yes, thanks, very helpful. In fact I have been reading here and there, and there are other experiences explained on the web… but I was trying to find something very specific for the LH351D and the Convoy S2+.

My concern is, as optics are very specific, the LH351D dome can interfere with the different TIR configurations that are available, and create a non-desirable hotspot pattern with the S2+.

In any case, I assume Simon has already played / tested them, and for this reason he is selling them for the S2+ in his store. I will buy some of them, and try.

But… which is the one that better fits my preferences? Maybe someone has already purchase them, and can help with beam photos, they are all welcome.

Thanks again!

QReciprocity42
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I have tried the 5 and 10-degree optics in an S2+ with LH351D. The beam looks much nicer than smooth or OP reflector, and the tint is much more blended. However, there is one major problem: if you accidentally drop the flashlight (or sustain any sort of impact), the square base of the LED will scratch the inside of the TIR lens and produce lots of plastic dust. I hypothesize that one of those butterfly-shaped 3535 gaskets might help, but haven't gotten to try it yet. 

benz
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QReciprocity42 wrote:

I have tried the 5 and 10-degree optics in an S2+ with LH351D. The beam looks much nicer than smooth or OP reflector, and the tint is much more blended. However, there is one major problem: if you accidentally drop the flashlight (or sustain any sort of impact), the square base of the LED will scratch the inside of the TIR lens and produce lots of plastic dust. I hypothesize that one of those butterfly-shaped 3535 gaskets might help, but haven’t gotten to try it yet. 

Good info, thanks! Does the scratching and dust have any effect on the beam quality?

jon_slider
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JBAlvarez wrote:
My concern is, as optics are very specific, the LH351D dome can interfere with the different TIR configurations that are available, and create a non-desirable hotspot pattern with the S2+.

there are actually only two primary differences in TIR
XP TIR are for smaller LEDs such as 219b and SST-20

XM TIR are for larger LEDs, such as XM-L2

there is not LH351d specific TIR

my guess, because the LH351d is larger than 219b, and closer to XM-L2, that the TIR to use w LH351d is the XM type

in any case, TIR are very inexpensive.. try both kinds and let us know what you learn.. please post pictures too Smile

imo the link to the TIR tests by MascaratumB is actually very likely to resemble the results you are trying to anticipate with LH351d

btw, when tightening the bezel over a TIR, it is important not to let the TIR rotate, as this can grind on the corner of the LED and create plastic dust, that you then need to clean out

I do not recommend using a butterfly type spacer under the TIR, because it is designed to have the LED inside the bottom cavity, not below the opening, since that would not capture the light coming off the side of the LED

good luck with your experiments!

Did you order the TIRs yet? Smile

QReciprocity42
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benz wrote:
Good info, thanks! Does the scratching and dust have any effect on the beam quality?

Not noticeably initially, though I swapped out the TIR as soon as I saw this is a problem. If the TIR is left in, I would expect the dust to accumulate over time. If lucky, you might just get a dirty beam; if not, the dust might heat up and burn the LED.

About XP vs XM TIRs: I suspect that the difference between these is more about the footprint than die size or beam profile. I don't think there's a nice way to center a 3535 LED in a TIR for 5050.

QReciprocity42
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jon_slider wrote:
I do not recommend using a butterfly type spacer under the TIR, because it is designed to have the LED inside the bottom cavity, not below the opening, since that would not capture the light coming off the side of the LED

If the issue with using a butterfly-type gasket is that the LED sits too low with respect to the TIR, I wonder if sanding the gasket thinner would take care of the problem? I also noticed that in the 5 and 10 degree 3535 TIRs I have, there's about 1mm at the base that does not actually participate optically and can thus be sanded away. I'm really hoping that one can find a way to make the gasket compatible with the TIR, since the gasket hides the sharp corners of the LED and should prevent them from scratching up the TIR during an impact.