Sofirn C01R deep red [sold out, discontinued]

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TimMc
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Unheard wrote:
Careful everyone. Just found out the head isn’t glued, just like the initial C01S batches.

Does the driver fall out toward the battery?

What kind of glue should be used?

the_holodoc
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Here are a couple more pictures of the light:

Kind regards
Frederick

Barry0892
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lotrbfme wrote:
It is out of stock on ebay Sad

Available again now!

LINK

WhatsApp: +8615773183209 

My new Facebook account: https://www.facebook.com/barry.dong.9250

muellihenry
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Barry0892 wrote:
lotrbfme wrote:
It is out of stock on ebay Sad

Available again now!

LINK


And ordered! Cool
Unheard
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TimMc wrote:
Unheard wrote:
Careful everyone. Just found out the head isn’t glued, just like the initial C01S batches.

Does the driver fall out toward the battery?


No, but if you tighten the head to much, you end up with the bezel at hand and the pill stuck to the tube, fully lit. Had this yesterday.

Sofirn used to glue later C01S with red threadlock.

Barry0892 wrote:
lotrbfme wrote:
It is out of stock on ebay Sad

Available again now!

LINK


If you’re still producing it – is it possible to again use threadlock on the bezel?

Smile, you cannot kill them all.

qandeel
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Barry0892 wrote:
lotrbfme wrote:
It is out of stock on ebay Sad

Available again now!

LINK

Still says out of stock for me Facepalm

 عُمَانْ

Unheard
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No artifacts:

I promised to mail someone if I found where I had them from, just forgot to whom it was. Jon?

Smile, you cannot kill them all.

Light-saber
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I placed my EBay order for a few Sofirn flashlights on July 3rd (incl. the C01R). The package arrived only 17 days later. Not bad for a parcel that originated in China and travelled all the way to the U.S. during this pandemic.

The C01R packs quite a lot of light for a tiny 1 x AAA flashlight. I’ve already put it to good use a couple evenings this week photographing Comet Neowise. I mostly used the flashlight on its lowest “moonlight” setting (0.5 lm) with a diffuser dome and hung it around my neck with a length of paracord. (The diffuser dome came free with my other purchase of a C01S).

The low soft red light helped me maintain my night vision while allowing me to change settings on my camera or as an aid during lens changes.

Very pleased with this Sofirn flashlight. It is my first Sofirn order, but certainly won’t be my last. Thank you, Lux-Perpetua, Barry/Sofirn and all others involved for carrying this project through!!


MoreHiCRILumens
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Light-saber wrote:
The C01R packs quite a lot of light for a tiny 1 x AAA flashlight. I’ve already put it to good use a couple evenings this week photographing Comet Neowise. I mostly used the flashlight on its lowest “moonlight” setting (0.5 lm) with a diffuser dome and hung it around my neck with a length of paracord. (The diffuser dome came free with my other purchase of a C01S).

Nice pics and I think you convinced me to get C01S green and that cool diffuser too. Big Smile

TimMc
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Unheard wrote:
No artifacts

Are there suppliers that sell 1-5 pieces of BK-LED-097WB25 in China/Oceania?

MoreHiCRILumens
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TimMc wrote:
Unheard wrote:
No artifacts

Are there suppliers that sell 1-5 pieces of BK-LED-097WB25 in China/Oceania?

I would also love to get one of those.

Unheard
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I don’t know. Got this link from someone here or over at TLF, don’t remember. Search for the dimensions, they should pop up somewhere else in the world.

Smile, you cannot kill them all.

Muto
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Barry0892 wrote:
lotrbfme wrote:
It is out of stock on ebay Sad

Available again now!

LINK

When will they make it to Amazon USA ?
Thanks

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TimMc
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ZL H502pr arrived today after almost a 2 month wait due to a lack of flights between Shanghai and Australia.

Sofirn C01R arrived within a few weeks.

Here are some amateur side-by-side photos:

H502pr set to 0.003 lumen and Sofirn C01R on it’s lowest mode:

H502pr at 1 lumen and Sofirn C01R on it’s lowest mode:

It’s that bloody cat again!

Sofirn C01R highest mode:

H502pr highest mode 100 lumens:

C01R is a nice little thrower while the H502pr is very floody without much throw beyond a few metres. I was pretty sure that the H502pr UI would be much better than the twisty C01R, but I had overlooked that the ZL has the older UI. There’s a risk that I could accidentally click to High while trying to long press for sub-lumen.

After not noticing that Sofirn sell diffusers the first time around, Unheard mentioning a honeycomb lens, wandering down the d-c-fix film rabbit hole, and then oweban mentioning Orange C01S…. I decided to order another C01R, a diffuser and an Orange C01S. Sofirn have already shipped!

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Received the C01R. It is a neat little light with a special colour! A minor critique: the beam is ok but not perfect, more major: the middle mode is way too close to the high mode, it is not low-med-high but low-high-bithigher. If Sofirn decides to expand this 3-mode UI to the other C01S types they should have another look at finetuning it.

Sari33
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djozz wrote:
Received the C01R. It is a neat little light with a special colour! A minor critique: the beam is ok but not perfect, more major: the middle mode is way too close to the high mode, it is not low-med-high but low-high-bithigher. If Sofirn decides to expand this 3-mode UI to the other C01S types they should have another look at finetuning it.

!{width:80%}https://i.imgur.com/4vAXIUA.jpeg!

thanks hope they correct the middle mode early

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Quote:
Careful everyone. Just found out the head isn’t glued, just like the initial C01S batches.
Quote:
[...] A minor critique: the beam is ok but not perfect, more major: the middle mode is way too close to the high mode, it is not low-med-high but low-high-bithigher. If Sofirn decides to expand this 3-mode UI to the other C01S types they should have another look at finetuning it.
Thank you guys! Thumbs Up I will let Barry know about these issues. A word about the beam quality: I assume Sofirn did not or even does not have any alternative optics available so far. So, they had no chance but to use the same optic they used for SST-20 4.000K 95CRI. That leads us to following point...

Thank you Unheard for posting some great information about the microlensed TIR optic BK-LED-097WB25. Thumbs Up I'm confident Sofirn will find this or an alternative optic that may diffuse the beam more evenly and eradicate the downsides of the clear-narrow beam spot lens they used so far. At least such a microlensed or frosted optic will be mandatory for C01S E21A to avoid tintshift. I hope they can order a significant amount to sell as a spare part or accessory for those who want to change the beam characteristics.

djozz
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About the middle/high mode again: with a fully charged Eneloop the high is significantly brighter than middle (although the middle should still be lower), but with the battery halfway there is no difference anymore. Makes sense of course but still the behaviour on a not fully charged battery is something you should consider when you design the UI.

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djozz wrote:
About the middle/high mode again: with a fully charged Eneloop the high is significantly brighter than middle (although the middle should still be lower), but with the battery halfway there is no difference anymore. Makes sense of course but still the behaviour on a not fully charged battery is something you should consider when you design the UI.

Thanks Djozz. I agree, the mode spacing should ideally go in line with the discharging of the battery, i.e. there should be a distinct visible difference between high and medium with a partially discharged battery. Do you have an AAA alkaline (1.5V) available to test this scenario again? I just want to make sure it's not only happing with 1.2V NiMH batteries. I don't know if a constant mode spacing will require hardware or firmware changes but I will do my best to transmit this information via Barry to Sofirn's engineering.

djozz
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Thanks for the suggestion trying alkalines. The mode spacing is much better on alkalines, and the light runs hotter too.

Makes me wonder if the Eneloop that I used is still good (it was fully charged). It does have a lower voltage than an alkaline but should be much more current-capable.

Another possibility is that the driver is particularly sensitive to the voltage difference between alkaline and NiMh.

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Courtesy by Djozz, the actual, measured dominant/peak wavelength of C01R:

hank
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Thanks Djozz for the spectrum.

I guess I won’t worry about the difference between 660 and 670 for eye health light sources.

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So I missed this, can the li-ion AAA cellsbe used with this light? Or only alkaline 1.5v or NiMH 1.2v?

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hank wrote:
So I missed this, can the li-ion AAA cellsbe used with this light? Or only alkaline 1.5v or NiMH 1.2v?

No, 10440 (3.7V) li-ion batteries must not be used with this light. You will most likely kill the LED within seconds.

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djozz wrote:
Thanks for the suggestion trying alkalines. The mode spacing is much better on alkalines, and the light runs hotter too.

Makes me wonder if the Eneloop that I used is still good (it was fully charged). It does have a lower voltage than an alkaline but should be much more current-capable.

Another possibility is that the driver is particularly sensitive to the voltage difference between alkaline and NiMh.

I use a white Eneloop that is 3 years old but was never used before and see a significant difference between mid and high mode for at least half of the battery capacity. Maybe in the last third the high mode isn’t that bright anymore but still notable brighter than mid. With a high capacity 1000mAh Panasonic Ni-MH it feels similar (having no measurement equipment). All in all the low mode is perfect for keeping night vision or going to the toilet half-asleep, the slightly larger step to mid mode is for actually seeing something and high mode was used for the lightpainting and is otherwise only used for assuring myself how bright this little beast can go. Cool

Initially I thought I should wait for another deep red light with a longer runtime but came to the conclusion that losing it would be a pity and orderd two more – one as backup and one for the next jealous person I will show it to (it’s such a beautiful color). There may be use for a floodier type of this but I really like the throw characteristic that illuminates only the spot of interest. So after >10 days of daily usage I’m still impressed by this phantastic little light.

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How low is the low practically? Can it be shone into dark adjusted eyes from 5m without causing pain / ghosting? The 15mA measurement someone posted seems a little high for a true dark-adjusted-eyes low mode.

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You’re right – shone directly in the eye is still critical bright, mainly because of the strong focussing. But in order to illuminate something I found it okay – as I said, I like the controlled throw. But I live in a very light polluted area, so in pitch dark a diffusor may be a good idea.

MoreHiCRILumens
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I think I add some DC-fix on this to get more flood and less bright hotspot because my use is mainly indoors and other smallish areas where throw aint needed.

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weegee wrote:
You’re right – shone directly in the eye is still critical bright, mainly because of the strong focussing. But in order to illuminate something I found it okay – as I said, I like the controlled throw. But I live in a very light polluted area, so in pitch dark a diffusor may be a good idea.

Thanks. I may just try frosting the optic. Or changing a sense resistor. I imagine this could be a popular light for people who operate in pitch darkness if it had an extreme low. Astronomy / astrophotography / etc. That red is a standard in these situations and not ultra-low white is a whole other topic.

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the_holodoc wrote:

Brightness comparison: Zebralight SC600 with some diffusion on its 0.2 Lumen level, right: Sofirn C01R on its lowest level


Low mode: 15 mA


This is what worries me. This picture makes it look uselessly bright on low without mods. Does anyone have a pic of the driver?

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