Articles
How to Read a Lens Spec Sheet Like a Pro
fStoppers
Spec sheets can look like alphabet soup—ED, ASPH, OIS, STM, USM, MFD, 0.5×—but each line quietly predicts how a lens will behave on a job. This guide strips out the marketing and shows you what matters, why it matters, and how to make smarter buys from your desk. No test charts needed; just practical translation from spec to outcome.
