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589nm 50mW Dragon Lasers Spartan Yellow Laser Review

badboybilly

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Very easy to adjust I’m sure you could get it a bit better than it is, no need to complain about that, a few members have recieved units with beams on a angle witch is even worse and strangely it’s becouse the beam exits the module off centre witch is impossible to fix.
 

Pouie

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Break the ashesives holding that aluminum pill to the host, and you'll be able to change the focus.

I have a front surface mirror I aim the laser down the hallway at and focus using the wall behind me. Much easier than walking back and forth or asking a friend to help with
Thanks so much for the pics and advice! How do you break the adhesive holding the pill in place? Any tools used?
 

ZRaffleticket

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I have some of these, though I didn't need them, torque was enough to get the cap free.



Be very careful about scratching the lens if you plan on getting something in there as there is very little room between the lens and the cap
 
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Pouie

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Break the ashesives holding that aluminum pill to the host, and you'll be able to change the focus.

I have a front surface mirror I aim the laser down the hallway at and focus using the wall behind me. Much easier than walking back and forth or asking a friend to help with
Thanks so much for the pictures and thanks to everyone else for their advice.

I did pop the glue off with a flat-head screwdriver and adjusted the lens. As I think you can see from how round the dot is, I got it about as good as I can - because when it is less focused, it turns into a sloppy mess.

It isn't too much smaller, however, and it certainly isn't as small as BowtieGuy's.

20 ft.





34 ft.










What do you think? I think I a lot of it was the door being white and my hand also being the color white.
 

ZRaffleticket

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It could be that. I'll say yours looks very close to what mine does if at 20ft it's down to about a half inch. What camera are you using? You can get a better look at the spot by adjusting the ISO and shutter speed.

For example, these are my 476 and 480nm lasers running at a low ISO and fast shutter speed:


Bowtieguy's might also have been an older unit, which with DPSS could have been made with better optics. I know its true for a lot of the old high quality 532nm greenies, divergence then was fantastic and now it's nowhere close on the same products... could be a similar case.
 

BowtieGuy

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Hey Pouie, that dot looks good, nice and round; I wouldn't mess with it any more. :)

@ZRaffleticket - Looking back, I see that my 589nm Spartan was purchased in 2014, in Jmillerdoc's 589nm Spartan group buy.
That wasn't too very long ago, but I'm not sure what build quality changes may have been made between then and now.
 

RA_pierce

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Nice review and cool laser, Pouie.

Here's a tip: if you are going to measure divergence, direct the beam onto an untextured matte black surface. This will make it easier on the eyes and make it easier to discern the boundaries of the beam. It will also help with taking photos, because the beam will often end up getting over-exposed on light-colored surfaces which will make it appear larger than it actually is. For low power lasers, a piece of black paper works.

I think your laser looks fine. It's easy to get obsessed with the divergence but these are usually built and set for minimum divergence. DPSS lasers do vary in beam quality especially when the power output is high (40mW is pretty high for a 589nm) so you shouldn't expect that your laser will be exactly the same as anyone else's. Enjoy your laser, it looks great!
 

Pouie

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It could be that. I'll say yours looks very close to what mine does if at 20ft it's down to about a half inch. What camera are you using? You can get a better look at the spot by adjusting the ISO and shutter speed.
I was just using my Google Pixel phone for the dot pics. :shhh: Good point that if I wanted a more accurate representation I should have used my DSLR and adjusted the ISO, etc.

Thanks again for all your help. Like the handsome cat said, it's nice and round now so definitely an improvement. Now I can relax and enjoy that amber beam. :yh: I mean it was only $500 why would I expect them to set the beam perfectly for me? :na:

For the record of anyone reading this in the future, I used needle nosed pliers to very carefully turn the lens pill thing that rides on the same threads as the top cap. (Pictures provided by others above in their posts)

Nice review and cool laser, Pouie.

Here's a tip: if you are going to measure divergence, direct the beam onto an untextured matte black surface. This will make it easier on the eyes and make it easier to discern the boundaries of the beam. It will also help with taking photos, because the beam will often end up getting over-exposed on light-colored surfaces which will make it appear larger than it actually is. For low power lasers, a piece of black paper works.

I think your laser looks fine. It's easy to get obsessed with the divergence but these are usually built and set for minimum divergence. DPSS lasers do vary in beam quality especially when the power output is high (40mW is pretty high for a 589nm) so you shouldn't expect that your laser will be exactly the same as anyone else's. Enjoy your laser, it looks great!
Thanks so much, I appreciate the tips. Next time I do a dot shot I'll use something black with a fire extinguisher in close proximity! :p

Speaking of which, here's a preview of my next review:

 

paul1598419

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I'm glad you got the lens adjusted where you are happy with it now, Poule. I hope you get years of enjoyment out of it.
 




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