What is SFR? Spatial Frequency Response in Camera Testing
A camera does not have a sharpness. It has a curve. That single idea is the thing most people are missing when they ask “how sharp is this camera?” expecting one number back. The honest answer is that a camera reproduces coarse detail almost perfectly and fine detail progressively worse, and the rate at which […]
Standard vs Enhanced ISO 12233 Test Chart: When to Pay for the Pro Version
Most people reading this only need the Standard chart. We’ll say that up front, because the internet is full of “buy the premium version” advice written by people who profit from the upgrade, and you deserve a straighter answer than that. But “most” is not “all.” There is a specific set of measurements the Standard […]