Fenix TK75 [3xXM-L U2, 4x18650] Review

gritzo

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Jan 29, 2013
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Got the TK75 on the weekend and so far i am very happy with the light output!

One thing that has me confused is second time out with the TK (first time around 30 min of use)and was using it 95 % of the time in high mode(not turbo), when switching it into turbo mode after about 40 minutes,it would switch back down to high mode immediately.No matter how many times i clicked up into turbo it kept switching back down to HIGH MODE.

IS this normal ? i thought it supposed to stay in TURBO mode until battery depletion.
 

wertzius

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AW: Fenix TK75 [3xXM-L U2, 4x18650] Review

No, if you use weak cells like Trustfire the TK75 will not stay on high after some usage of other modes because the voltage of the cell will drop too far.
 

gritzo

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Re: AW: Fenix TK75 [3xXM-L U2, 4x18650] Review

No, if you use weak cells like Trustfire the TK75 will not stay on high after some usage of other modes because the voltage of the cell will drop too far.

Well, i am using the FENIX branded batteries so i really dont understand what the problem is ...can you put the tk75 in turbo mode for 1hr15 minutes straight or does it shut down after a certain time? (clicking up every twenty minutes from protection mode of course)
 

Grizzlyb

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Thanks for the review candle lamp, great insight.

Awesome thrower. Comes close to the TK70 and is far better then my TM15.

I realy Like the UI of the TK75. Glad that they stayed with the proofen concept of the other TK models like the TK35.
1 button for on/off and 1 to switch modes. Can't come any simpler. It also has the memory for the mode. So I don't get surprised when I switch it on.

All in all, I like it better then my TM15.
I realy hate the UI of the TM15. Comes on when I don't want it (almost burned a whole in my backpack). Even in the holster the switch is turned on without wanting it.
 

wertzius

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@gritzo
The TK75 runs max. 50 min in Turbo. Not more. If you use High for an hour you will probably loose the Turbo because the cells only reach a lower voltage, which isn't high enough to provide Turbo mode.
With fresh cells you should reach at least 45 min. Turbo in a row.
 

gritzo

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@gritzo
The TK75 runs max. 50 min in Turbo. Not more. If you use High for an hour you will probably loose the Turbo because the cells only reach a lower voltage, which isn't high enough to provide Turbo mode.
With fresh cells you should reach at least 45 min. Turbo in a row.

Yeah,I was thinking that the batteries don't have enough juice to run TURBO mode as well...thanks for the reply!
 

ArmoredFiend

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Thanks.
Runtime on continuous turbo mode with Fenix 2600mA about 64 minute.

I am pretty bad with all these calculations. So if assuming i am using AW 3100mA, how long would it go on turbo mode? Assuming 2600mA above will last 64mins. Will it be 12mins more?

Am asking coz i noticed Fenix 2600mA is being sold at $13 a piece whils AW 3100mA is at $21 a piece. And since i might be getting the extender, that would be additional $8 x 8pcs = $64 additional. :(
 

candle lamp

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I am pretty bad with all these calculations. So if assuming i am using AW 3100mA, how long would it go on turbo mode? Assuming 2600mA above will last 64mins. Will it be 12mins more?
The AW3100 is much higher capacity cell than 2600mAh. The result may however different than what you expect. The runtime on continuous (i.e., accumulated) turbo output with 3100mAh will be less than 2600mAh. The initial (turbo) output is dependent on the specific internal battery chemistry. But as you expected, the 3100mAh cell will perform better in entire (non-accumulated) turbo runtime. ;)
 
Last edited:

ArmoredFiend

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The AW3100 is much higher capacity cell than 2600mAh. The result may however different than what you expect. The runtime on continuous (i.e., accumulated) turbo output with 3100mAh will be less than 2600mAh. The initial (turbo) output is dependent on the specific internal battery chemistry. But as you expected, the 3100mAh cell will perform better in entire (non-accumulated) turbo runtime. ;)

hmm..got it. now it's time to determine whether a couple minutes more are worthy, hehee. Thanks a lot!
 

cmichael

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I have tn30 and Supbeam K40. Do you have compairson picture of the Supbeam K40 to Fenix TK75? Which are better thrower?
 

candle lamp

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I have tn30 and Supbeam K40. Do you have compairson picture of the Supbeam K40 to Fenix TK75? Which are better thrower?

According to the peak beam intensity manufacturer claims, K40 & TK75 are 75,000cd & 92,000cd respectively. Let's see the beamshots.

1. 55m Outdoor Beamshot

- ISO100, F/2.8, 1sec, Auto white balance


S-48.jpg

-Control Shot
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S-49.jpg

-K40
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S-50.jpg

- TK75
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S-51.jpg

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2. 60~65m Outdoor Beamshot

- ISO100, F/2.8, 1sec, Auto white balance

S-52.jpg

- Control Shot
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S-53.jpg

- K40
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S-54.jpg

- TK75
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S-55.jpg

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3. 140m Outdoor Beamshot
- ISO100, F/2.8, 1sec, Auto white balance

S-56.jpg

- Control Shot
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S-57.jpg

- K40
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S-58.jpg

- TK75
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S-59.jpg

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4. 150m Outdoor Beamshot

- ISO100, F/2.8, 1sec, Auto white balance

S-60.jpg

- Control Shot
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S-61.jpg

- K40
.
.
S-62.jpg

- TK75
.
.
S-63.jpg
 

Kabible

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How would you all rate your particular TK75's beam tint? Most of the beamshots (of which Candle lamp's are excellent) are shot with AWB on which doesn't fairly depict color rendition.

I'd love to get one of these but I will not own another light with a greenish tint that seems so common with XML U2's.
 

candle lamp

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Man, the people in that building are PISSED! LOL
I think the people in that building are gonna be pretty pissed off when seeing my TK75's cannon beam, they fortunately have been asleep at that time. ;)

How would you all rate your particular TK75's beam tint? Most of the beamshots (of which Candle lamp's are excellent) are shot with AWB on which doesn't fairly depict color rendition.
The hotspot is pure white and the surrounding small sized corona is a bit yellowish green on my sample. The spill is somwhat bluish. The overall impression of the color tint I have is slightly cooler side.
 

Kabible

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Thanks Candle lamp. How does your tint fare on lower outputs? This is a current regulated light. HML U2's tend to be greener when driven at lower current rates.
 

cmichael

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Jan 11, 2007
Messages
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Las Vegas
Thanks Candle Lamp for the comparison. The TK75 will out beat my K40, not by much. I like the useful spill on the TK75. I think I will wait for something more powerful in throw and spill soon in the future.
 

candle lamp

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Thanks Candle lamp. How does your tint fare on lower outputs? This is a current regulated light. HML U2's tend to be greener when driven at lower current rates.
Yes, the tint on low output looks yellowish greener than higher (Turbo, High, med.) output. The low output makes the bluish side spill relatively dimmer, while yellowish green hot spot & corona stand out against the dim side spill. There's no much difference in tint among Turbo, High, and Med. output.
 

lintonindy

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Jul 5, 2012
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Thanks Candle Lamp for the comparison. The TK75 will out beat my K40, not by much. I like the useful spill on the TK75. I think I will wait for something more powerful in throw and spill soon in the future.

I too have the K40 which is a great torch and was also interested in the comparison between the two. I echo your sentiments and decided to place my money on the modded TN31MB. I do like the TK75 and I would prefer it to the K40 but I don't see the point in investing that kind of money for that kind of gain. I am also looking for a flood/thrower and I'm thinking that the X40 by Supbeam or the TN30 might be my next move. If I had it to do over again though, I would pick this TK75 up over my K40 but already owning it I need better results than that.
 
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