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520 nm vs 532 nm laser who is better ?

Alaskan

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Jan 29, 2014
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I need to research the application of a spacial filter acting as an expander, have not run across that info before, what is the downside? I imagine it must be filtering prior to collimation?
 



kecked

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Jun 18, 2012
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Watch planters videos. Not my idea. The only thing I do is change the ratio of the lens to act as s telescope
 




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