The Atomstack laser engravers come with a laser diode which outputs approximately 4.5W-33W of optical power. Laser diode is a fixed focus diode which is great. The laser diode is claimed to have a square beam spot shape. Traditional lasers are zoom lasers and require to look directly at the laser spot to find a proper size. The Atomstack laser is a fixed-focus laser, it only need a fixed-focus sheet to get the best engraving focal length. So you won't have to manually adjust the laser before focusing.
Once you're ready to cut or engrave a material, all you have to do is follow a quick set of steps. Place the included fixed focus piece, move the laser head above it, and loosen the adjustment knob to lower the laser. After you tighten the handle screw, simply remove the fixed focus piece before getting started.