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Didnt want to start new thread for one simple question, and it wouldnt fit in the category my thread already is in. Anyways wont do this again. And thanks. Will look at the G-2 lens type

405nm 445nm Laser Diode Three Layer Collimating Coated Glass Lens M9*0.5 HOT | eBay Should this be okay if I want to focus laser to engrave to white paper with 500mw 405nm laser?

Okay, I have no idea how lenses work. Will check that out

Okay, I will probablly buy the 500mw 405nm full module with cooling. I guess 405nm is the best wavelenght for paper engraving. Thank you!

So, found one 300mw, 3.8mm 405nm laser for 20usd, Will this work with white paper? 300mW Laserdiode 405nm Veilchenblau Laser Diode Modul Lasermodul | eBay Or there is another one, 445nm 1W, 5.6mm for 18usd. type is NDB7412T 1W 1000mW Laser Diode Blue 445nm TO-18 5.6mm | eBay Which is better...

And how many watt do i need to cut White paper with 808nm?

Can you link me to something that will tell me what the difference between some wavelengths? Tyvm

For 300mw i found 808nm wavelength. Should be okay

Hey, I was searching for this, but could not find anything that would tell me. I am planning of building homemade laser engraver, but I am not sure which laser to choose. 1W lasers are too expensive, so I was wondering that 300-500mW could be enough. But can I engrave white paper used in...