6 Common Mistakes That Ruin Your ISO 12233 Test Results
Most “wrong” ISO 12233 SFR results trace back to one of six setup mistakes — chart flatness, lighting, focus, in-camera processing, chart size, or skipping the sanity check. Here’s how each one fails, and exactly how to fix it.
Why a $50 Printed ISO 12233 Chart Is Lying About Your Lens Sharpness
You can buy a $20,000 cinema lens and a $50 chart you printed at home, and what you are actually measuring is the chart. That sounds like a sales line. It is not — it is what the math says. The ISO 12233 standard makes specific demands on feature accuracy, contrast, flatness and spectral neutrality, […]