[PART 1] Official BLF GT Group Buy thread. Group buy officially closed! Lights shipping.

[Wieselflinkpro]

@polarweis

!!
Not the best quality photo but on the left my GT got it today with registered. On the right my dads GT that he got with DHL couple of weeks ago(beamshot about 3 meters away from wall) Reflectors are pretty different if checked by eye. Mine has got a smaller hotspot. When shining further away the difference is less noticable.

If the reflectors so much different, they can not be good focussed for each reflector.

For my GT, I think its not well focussed, the beam is getting thicker and thicker.
I compared my GT with my Astrolux MF02 and it seems that the GT is not realy brighter than the MF02, but the hotspot is smaller than the MF02 (which is not good focussed too). But you have to remember, that I have a faulty LED: BLF GT official support thread [FAQ updated 11 Jan 2018] - #145 by Wieselflinkpro

[Pöbel]

The difference in Corona diameter might point towards different LED-position (focus) as a more likely reason instead of just reflector finish.

[southland]

Seems like focus, not reflector.

[Kingjohn]

@southland

Seems like focus, not reflector.

and what could be done here, to fix the focus?

s.:
according to tracking, my GT seems to have reached my country yesterday.
Now hopefully I will not have to wait much longer….

[JasonWW]

@Kingjohn

@southland

Seems like focus, not reflector.

and what could be done here, to fix the focus?

You could try adding a couple pieces of paper under the black centering thing. See if that makes it better or worse. (this moves the reflector away from the emitter)

If better, add a couple more pieces of paper.

If worse, then you might have to sand down the bottom of the black piece to make it a tiny bit thinner. (this moves the reflector closer to the emitter)

[Myers]

@polarweis

!!
Not the best quality photo but on the left my GT got it today with registered. On the right my dads GT that he got with DHL couple of weeks ago(beamshot about 3 meters away from wall) Reflectors are pretty different if checked by eye. Mine has got a smaller hotspot. When shining further away the difference is less noticable.

I measured the picture with a ruler I got a big 29% difference.

Could you make a measurement of the hotspots? You wrote 3 meters from wall. JasonWW wrote 20,5cm at 9 feet (2,74 meters).

[Kingjohn]

@JasonWW

@Kingjohn

@southland

Seems like focus, not reflector.

and what could be done here, to fix the focus?

You could try adding a couple pieces of paper under the black centering thing. See if that makes it better or worse. (this moves the reflector away from the emitter)
…

Would paper be a wise choice of material?
I just think about high temperatures and paper….

You may not have a Molotowflashlight afterwards, but maybe the paper could char and disintegrate?

[JasonWW]

@Kingjohn

@JasonWW

@Kingjohn

@southland

Seems like focus, not reflector.

and what could be done here, to fix the focus?

You could try adding a couple pieces of paper under the black centering thing. See if that makes it better or worse. (this moves the reflector away from the emitter)
…

Would paper be a wise choice of material?
I just think about high temperatures and paper….

You may not have a Molotowflashlight afterwards, but maybe the paper could char and disintegrate?

I’m just guessing. Paper should be good enough for testing purposes. Another material might be better for a permanent spacer.

[polarweis]

@Myers

@polarweis

!! Not the best quality photo but on the left my GT got it today with registered. On the right my dads GT that he got with DHL couple of weeks ago(beamshot about 3 meters away from wall) Reflectors are pretty different if checked by eye. Mine has got a smaller hotspot. When shining further away the difference is less noticable.

I measured the picture with a ruler I got a big 29% difference. Could you make a measurement of the hotspots? You wrote 3 meters from wall. JasonWW wrote 20,5cm at 9 feet (2,74 meters).

Its less in reall life i guess, the photo makes one spot brighter.

What i also tried is put them on moon light mode and walk towards the wall i will see a square(the led) with mine GT, the other GT there is never really a square it always kinda stays a cirlcle. Maybe other people can try this and tell what they see(or picture)

[Wieselflinkpro]

@Kingjohn

@southland

Seems like focus, not reflector.

and what could be done here, to fix the focus?

s.:
according to tracking, my GT seems to have reached my country yesterday.
Now hopefully I will not have to wait much longer….

Look here: Light collimation with an LED flashlight

[mrheosuper]

Can someone providing me Tracking code, pls

[polarweis]

@Texas_Ace

@Bozlight29

@polarweis

!! Not the best quality photo but on the left my GT got it today with registered. On the right my dads GT that he got with DHL couple of weeks ago(beamshot about 3 meters away from wall) Reflectors are pretty different if checked by eye. Mine has got a smaller hotspot. When shining further away the difference is less noticable.

My GT, on the right, has a bigger and less intense hotspot. The reflector of my son’s GT is better, more mirrorlike, as mine is more OP.

Interesting, have you taken any lux readings side by side with fresh cells in each?

It’s btw in no way any criticism. Both light throw extremly well. Just slight difference in beam profile, but with so much variables its expected that there are some.

[Kingjohn]

@Wieselflinkpro

Look here: Light collimation with an LED flashlight

Thanks!
Very good explanation from Enderman…

[M4D_M4X]

@mrheosuper

Can someone providing me Tracking code, pls

seems not shipped atm

[Lfatman]

Received my unit in Salamanca (Spain). Registered mail. Batteries included. One box. No fees.

It’s awesome. The Led is perfectly centered. The reflector is very well mechanized. It’s an amazing flashlight.

Congratulations, GT Team, for this spectacular project. Thank you!

[djozz]

@polarweis

@Texas_Ace

@Bozlight29

@polarweis

!! Not the best quality photo but on the left my GT got it today with registered. On the right my dads GT that he got with DHL couple of weeks ago(beamshot about 3 meters away from wall) Reflectors are pretty different if checked by eye. Mine has got a smaller hotspot. When shining further away the difference is less noticable.

My GT, on the right, has a bigger and less intense hotspot. The reflector of my son’s GT is better, more mirrorlike, as mine is more OP.

Interesting, have you taken any lux readings side by side with fresh cells in each?

It’s btw in no way any criticism. Both light throw extremly well. Just slight difference in beam profile, but with so much variables its expected that there are some.

I’m going to measure throw of my GT and Nicolaas’ GT somewhere next week, it seems that you and/or your dad are also in or near Amsterdam?, we could make it a 4x GT session then if you are interested.

[Yokiamy]

@djozz

I’m going to measure throw of my GT and Nicolaas’ GT somewhere next week, it seems that you and/or your dad are also in or near Amsterdam?, we could make it a 4x GT session then if you are interested.

Too bad i don’t live near Amsterdam, otherwise i’d join

[polarweis]

Both GT’s on moonlight about 3 meter distance. Right is mine, left my dads.
!
image uploader
!

[Nicolaas]

I would be very intrerested to find out what exactly is causing the difference - and how big the difference is on Djozz’ light meter…….

Provided good whether we could go outside (we have a nice beamshot area at a 5 min drive) and compare our GT’s to some other lights,
like my TN42 and modded Nitecore TM36 Light (dedomed XP G2 S2 with 849Kcd).

Cheers
Nico

[M4D_M4X]

on 3m distance and lowest ramp (on - ramp up a bit - then ramp all the way down) i get a ~14cm spot