Focal lens 1250mm

[Borislav@87]

First test of the lens from Aliexpress with 1250mm focal length. I am very pleased with the result.

https://a.aliexpress.com/_EIcit6N

 

[Gryphon]

Ill have to try that, I wouldn't mind being a bit further away from my target when using my array based lasers

 

[Borislav@87]

Ill have to try that, I wouldn't mind being a bit further away from my target when using my array based lasers

With my laser box 125W+. Very good results

 

[atomd]

The longer focal length, the smaller the NA and the bigger the laser spot so smaller power density