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cncoletech 18mm co2 laser lens with 50.8mm / 2 inch focal length - ideal for co2 laser engraving and cutting machines logo

CNCOLETECH 18mm CO2 Laser Lens with 50.8mm / 2 Inch Focal Length - Ideal for CO2 Laser Engraving and Cutting Machines Review

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Poor

Revainrating 2.5 out of 5  
Rating 
2.7
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Description of CNCOLETECH 18mm CO2 Laser Lens with 50.8mm / 2 Inch Focal Length - Ideal for CO2 Laser Engraving and Cutting Machines

Material: Hight quality Znse crystal. Focal Length:50.8mm/2" ; Dia:12mm/18mm/19mm/20mm/25mm optional; Thickness:2.2-2.3mm;. Double-sided solid Coating;Resistance to wipe;High transmittance; Long service life. It's good for 40W/50W/80W/100W/130W/150W CO2 laser 10600nm 10.6um. It can be used for CO2 laser engraving and cutting well.

Reviews

Global ratings 3
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Type of review

Revainrating 5 out of 5

Wrong lens / does not match the package focal length

Although this is an 18mm ZnSe lens, the correct description ends there. They ship lenses that have a focal length of 25mm and label them as 50mm. Be careful with this seller.

Pros
  • Focal length: 50.8mm/2in; Diameter: 12mm/18mm/19mm/20mm/25mm optional; Thickness: 2.2-2.3mm;
Cons
  • Crumpled

Revainrating 2 out of 5

Instant Power!

I bought a pneumatic assistant that allows you to use an 18mm lens, so I tried this lens, the price is decent and the performance. Didn't look much different than more expensive brands. Today I received mirrors from the same sellers. So I installed it on my K40 laser engraver and replaced the stock laser head with a new air cushion LO head, lens and mirror. At first I screwed up the alignment, but after some adjustments I set the power to 10% and tested on cardboard. BAMM! He cut through the…

Pros
  • Can be used for engraving and cutting with CO2 laser.
Cons
  • Not sure

Revainrating 1 out of 5

Wrong lens received

Good news: After a quick inspection the lens was ok. It was a little cloudy but cleaned up well with alcohol. Bad news: I ordered a 50.8mm lens. The box I received said 50.8mm on the label but it was a 38mm lens. Luckily I saw a few reviews with similar issues so I measured the focal length before installing it in my laser cutter. I already had the 38mm lens that came with it, so I sent it back. Measuring the focal length of a converging lens (a lens that can focus a beam) is very simple: (1)…

Pros
  • Material: High quality Znse crystal
Cons
  • Cable is shorter than other picks