I've got 500mw 532nm laser pointer and I want to make this laser focus adjustable or at least find some ways to make it burn stuff more efficiently. Is there any specific lens I should buy? If so, which one? Any useful information will be appreciated.
>inb4 I should use magnifying glass. Magnifying glass doesn't work the same with lasers, idiot.
>inb4 I should use magnifying glass. Magnifying glass doesn't work the same with lasers, idiot.
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