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Blue-light structured light, infrared, or blue laser? The right 3D scanner depends on object size and the accuracy you actually need. Sixteen scanners compared, from the $215 Seal Lite to the $5,999 Sermoon X1.

Diode, CO2, fiber, or dual-laser? The right laser engraver depends on your materials first and your budget second. A plain-English guide with real machines at every tier, from $549 to $13,999.