How Nikon Made Its Pro Zooms Lighter Without Compromising Quality

If you're carrying the original Z 24-70 or 70-200 and wondering whether the Mark IIs are worth the upgrade grief, Nikon's own explanation of what changed answers that — lighter glass elements, revised optical formulas, and tighter mechanical tolerances that collectively shave real weight without the usual optical trade-offs. For wedding and event shooters humping both lenses all day, that weight reduction alone changes the conversation.