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What is interesting that Dragonlasers has lab laser modules with divergence <1 mrad (with the same with Spartan beam diameter) and much greater price. How do you think what is the main difference in construction? Is there any optics? Unlikely due to high power. 447nm 1Watt Blue Laser - Lab Laser...

aryntha, do you know, what is the power of this Polaris? Does the most powerful Polaris have just the same circle beam and so good divergence? And what Polaris did you buy (what power)?

It's interesting to see the beam (what shape it has) and measure the divergence(if it's not circle then what axis diverges with 0.9 mRad?) @Justin Could you please provide beamshots or some videos of high-power Polaris in action?

Spartan's divergence is 2.5-3 mRad, and Laserglow's Polaris has 0.9 mRad. It's huge difference. Polaris offers unsurpassed quality of components and perfectly adjusted optics.

If it is glass, no dust except sand can damage the lens. The lens coating - yes, but not the lens surface. I've used new, absolutely clean cotton sticks from a lens cleaning kit and the lens cleaning fluid also from that kit. It's very hard to scratch compact disc surface with it but it's...

I'm not sure about the exact kind of material used, but I know that it is easy to scratch even with a cotton swab. If you don't believe - check yourself :yh:

What I want to say to all of the Spartan owners is DON'T try to wipe the lens in any case with any material. The lens is plastic or acrylic so it's very easy to scratch it (like CD surface). Use only penicillus very gently to brash off the dust. By the way, I contacted Dragonlasers support and...

It's definitely plastic or acrylic, because it is very easy to scratch even with the cotton swab and lens cleaning fluid. There were no abrasive particles and after cleaning I saw many microscratches. The material of lens seems to be like compact-disc coating - every material can cause...

Ok, but some people enter only this forum section and others - only that section. I only want to hear advices of all of them

Need help! The lens in my Spartan have become dim after some time. It seems that there is some condensate or something inside, because my attempts to clean the lens aren't successful. I've cleaned the lens gently with a cotton wool and lens cleaning fluid but there some scratches appeared (Is it...

What is the material Arctic's lens? Spartan has plastic - it's bad. Easy to scratch even with a cotton swab. And is there possibility to adjust position of the lens in order to get better divergence?

I've used cotton swab and lens cleaning fluid for high quality optics and anyway I've got scratches! I thing it's stupid and unacceptable to use plastic lens in 250$ device. It's almost impossible to clean lens without scratches if it's plastic.

Need help! The lens in my Spartan have become dim after some time. It seems that there is some condensate or something inside, because my attempts to clean the lens aren't successful. I've cleaned the lens gently with a cotton wool and lens cleaning fluid but there some scratches appeared (Is it...

what is the material of the lens? I'm shocked but I think it's plastic, not glass. I've just tried to clean the lens with a cotton wool on a match and it seems that there some scratches have appeared. Who knows, what lens it can be replaced by? Maybe from some DVD-drives?

I've tested my batteries after charging with this Ultrafire charger. I've got 17 minutes of continuous working with an ability to burn light-coloured wood. Then the beam becomes weaker and weaker. Is it very bad result? How much time do other LiFePo4 batteries work? Especially using other chargers.

I have a question about this Ultrafire charger: http://www.batteryjunction.com/rcr123a-uf-wf138a.html http://www.flashaholics.co.uk/batteries/ultrafire-wf138-charger.html I can switch between 3.6V and 3.0V but as I've measured output voltage it's 4.8V in both cases. What's the difference between...

And what about the current expander? What will happen if I put it on Spartan? As I understand, the expander has quite simple construction. It works as a monocular but without turning the image. By the way I had experiments with my x10 monocular and I obtained less divergence 10x(exactly equals...

Finally got my Spartan 1w. Measured divergence is obout 2.16mrad. (3.5mm at apperture, 10mm at 3m). But it's big anyway in comparison with my old green 200mW laser (1.4mRad). Are there any possibilities to reduce the divergence? Maybe there are some adjustments inside.

Are there any possibilities to reduce divergence in Spartan 1W? Mine has 2.17mRad and it's big in comparison with any popular green laser.

So are there any cases of lower divergence? Someone told about 1.33mrad for arctic. Is it true?