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External Lens Spring

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Hello Guys,

last time i looked a little at Survival Lasers and also ordered some Stuff.

i ordered that :
Internal Lens Spring
because i tought Black is better than a Shiny Spring inside the Lens module.

then i ordered :
Extended Length Focusing Ring - Blue Anodized
because its insanely cool :)

and also that :
Silicone Lens Cap
Eagle Pair® 190-540nm Slip Over Laser Safety Goggles

and at looking around i found this Spring too External Lens Spring 5-Pack

My question now is what are the Improvements over the "inner lens Sring" or do i need both springs to use with my blue extended focusing ring ?

I have this Module 445nm 9mm Diode In Copper Module W/Leads &
405-G-2 Lens


I'm nearly finsihed with my 3W Build, but my friend had been no time to machine my Heatsink.. Im waiting for 3 weeks now. But its also a little special looking and more work to do. I hope he get it finished this weekend.
Thank you alot for your Help
Best regards. :)

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