Description
How to choose the right focal length?
The focal length (in inches, e.g. 1.5″, 2.0″, 2.5″, 4.0″) determines how deeply and how precisely the laser will cut or engrave.
| Focal length | Main use | Advantages |
| Short (1.5″ – 38.1 mm) | Fine engraving, thin materials | Extremely small dot, high level of detail. |
| Medium (2.0″ – 50.8 mm) | Universal use (cutting and engraving) | The most popular lens. A good compromise between cutting depth and detail fineness. |
| Long (2.5″ to 4.0″) | Cutting thick materials (e.g. thick wood, acrylic) | Long focal cone (the laser keeps its power through the entire material thickness). |
