New LOGAN LED flashlight

[tucolino]

wow!!!that´s what i call good numbers!!!

thanks busseguy.
seems like perfect to me

couple of questions:
are there any size problems if i use an aw rcr123?
has anybody got pictures of the old McKinley and the el capitan?just for size comparation.
thanks

 

[MWClint]

AW RCR123 fit fine in the peak single cr123 sized lights.

 

[p97z]

I can't wait for this!

Does it use PWM by any chance?

 

[NutSAK]

I can't wait for this!

Does it use PWM by any chance?

No chance. Peak doesn't use PWM regulation.

 

[p97z]

Perfect!

I really can't wait now!

 

[fyrstormer]

You can order their lights at any power level you want. It's only a conservative guess, but the #8 level, the highest, is probably at least 150 lumens. Though they don't rate their lights by lumens.

I spoke with Peak last week about this and it uses the same driver as the El Capitan, but with a slightly narrower beam.

The only thing to consider is that most of Peak's lights don't have what we would consider "modern" drivers, so they don't have multiple modes. If he wants something that works the same as his old P1D, this might not cut the mustard.

 

[easilyled]

2 Brass Logans #8 arrived in the UK today. First impressions are very favorable.

I already knew what to expect in terms of machining because I have a Brass Ranier which I really like.

However I'm also impressed with the nice tint. Both of these are very pure white which is a relief since XPGs are known to be greenish quite often.

The output seems very good (although its daylight here) and the beam from the optics is a nice mixture of hotspot and concentrated spill.

So although it was quite a struggle to persuade Peak to allow me to buy them and then to convince them to send them, it was worth it in the end.

 

[Nyctophiliac]

Glad you got them. Any chance of pics?

 

[easilyled]

Glad you got them. Any chance of pics?

Sure. I'll wait until daylight though as my photographic skills are not that great.

I carried out comparative ceiling bounce tests, and would estimate the OTF lumens to be about 120 on the CR123s that were provided with them
(Brand called Ultralast - They are very slightly brighter than my Ti-PD-S on high which is about 105 lumens).

However on fully charged RCR123s, the output is 300+ lumens.

I would expect this kind of difference if the lights were Direct Drive, but Curt_R said in the 1st post that they are supplied with a buck-boost driver?

Surely if that were the case, the output would be much more similar between the different cell types?

 

[easilyled]

Pictures as promised .....

These show the brass Logan compared to the Rainier which is the larger light.
The 2nd picture down shows the view of the Logan optic in its head.
The knurling on the Logan is finer and not as distinctive as the knurling on the Rainier which is from a few years ago. I prefer the knurling on the Rainier.

 

[tucolino]

wow,beautiful lights,mate!!!!

i prefer ss,but there is something about brass on peak flashlights....

also, i think you can exchange the bodies, am i right?

 

[easilyled]

wow,beautiful lights,mate!!!!

i prefer ss,but there is something about brass on peak flashlights....

also, i think you can exchange the bodies, am i right?

Thanks, yes, I love the look of Peak's brass flashlights too. :thumbsup:

You are quite right that the bodies of the Rainier and Logan are exactly the same size, so they are interchangeable.

What is impressive regarding the Logan, is that the head is so much smaller than the Rainier and yet with the optic, the hotspot is still quite concentrated.

 

[grinsefalle]

Congrats, easilyled! :wow:
These brass Peaks are some of the most beautiful flashlights ever!
They remind me of old sailing boats with their brass bells...

And thanks to easilyled, I have to get one, too.

Michael

 

[fyrstormer]

Thanks, yes, I love the look of Peak's brass flashlights too. :thumbsup:

You are quite right that the bodies of the Rainier and Logan are exactly the same size, so they are interchangeable.

What is impressive regarding the Logan, is that the head is so much smaller than the Rainier and yet with the optic, the hotspot is still quite concentrated.

Howzabout some pics?

 

[easilyled]

Howzabout some pics?

There are some that I already posted in this thread (only a few posts back)
If you mean beamshots, I'll leave them to someone that has better photography equipment than I have.

 

[fyrstormer]

Whoops, missed that the first time around. Looks nice. I especially like the optic. Would you say the beam is anywhere near as smooth as what you'd get from a textured reflector?

 

[easilyled]

Whoops, missed that the first time around. Looks nice. I especially like the optic. Would you say the beam is anywhere near as smooth as what you'd get from a textured reflector?

Yes, to my eyes its just as good. The spill is more concentrated and not as spread out. The hotspot blends smoothly into the spill without any artifacts.
The only clue that there is an optic in there from looking at the beam is the fact that it is more compact (as already mentioned) and a slight roughening at the edges of the spill, no doubt as a result of the margins of the optic itself. However this is not even obvious enough to be an issue on a white wall, let alone when using the light as an illumination tool. In essence, I think the beam-pattern is very impressive for edc puposes.

The only question I have about the Logans which remains unanswered is, why the output is so much higher on rechargeables compared to CR123s?

As stated earlier, on rechargeables, the output is round about the 300 lumen mark out the front, which is in the range that I would expect for the stated current of 1A that the driver is supposed to supply to the R5 XPG.

However on normal non-rechargeable CR123s, the output is little higher than 100 lumens.

According to Curt_R in the first post, this light is regulated using a buck-boost driver, and takes either CR123s or RCR123s.

This buck-boost driver is supposed to supply 1A regardless of battery-type.

It obviously doesn't do this for CR123s.

Some clarification from Curt_R on the matter would be quite welcome.

 

[fyrstormer]

It might supply 1A regardless of battery type, but that doesn't mean it supplies 1A @ 3V. Unless there is both current-control and voltage-control, then only the current is getting controlled. 1A @ 4.2V is more power than 1A @ 3V, and so the beam is brighter too.

What's always puzzled me is, for a single-speed light, why anyone would use a constant-current driver instead of a constant-voltage driver -- the resistance of the emitter dictates that the current flow would be held constant as long as the driver keeps the voltage steady. Either that, or I need to go back to the University of Wikipedia's School of Electrical Engineering and try again.

 

[easilyled]

It might supply 1A regardless of battery type, but that doesn't mean it supplies 1A @ 3V. Unless there is both current-control and voltage-control, then only the current is getting controlled. 1A @ 4.2V is more power than 1A @ 3V, and so the beam is brighter too.

What's always puzzled me is, for a single-speed light, why anyone would use a constant-current driver instead of a constant-voltage driver -- the resistance of the emitter dictates that the current flow would be held constant as long as the driver keeps the voltage steady. Either that, or I need to go back to the University of Wikipedia's School of Electrical Engineering and try again.

I think its more likely that the driver is not supplying 1A to the led when used in conjunction with the 3V cell.

I think that the led would be equally bright whether the battery was 3V or 4.2V, providing that the current supplied to the led is the same.

That is why the specs for leds quote a certain lumen output for a certain current. (Battery voltage is not a factor)

The power is determined by multiplying the Vf of the led (which is a constant regardless of battery voltage) to the current supplied to it.

I do feel that this information should be disclosed on the websites and in the first post of this thread.

If you look at that post, there is nothing to say that the output is 3 times higher on RCR123s than on CR123s.

 

[fyrstormer]

Well, a fresh CR123 can output more than 1A in a short-circuit, but maybe not when it has to push against resistance of the emitter.

The Vf isn't actually a constant, it's just a very steep curve. Not enough to singlehandedly account for the dramatic increase in brightness you claim, but as long as we're being academic about things, it's worth taking into consideration.