Many new users make the mistake of relying solely on YouTube tutorials or forum posts. While these are valuable supplements, they often contain outdated workflows or incorrect assumptions. The is the only source of truth for the software's behavior.
No other chapter reveals the manual’s soul like Tolerancing . Here, the idealized rays meet the real world. A lens designed with 0.01 micron RMS wavefront error in the Sequential mode becomes a sad, defocused blob after you add ±2 µm of decenter and 5% index variation. Zemax Opticstudio User Manual--------