CAT Theory Grade 11 Practice Test 2026 – Complete Exam Prep

Optical zoom works by changing the focal length with the camera’s zoom lens, magnifying the scene through the optics itself. This means you get a closer view by moving lens elements inside the barrel, not by adding pixels or enlarging them digitally. That’s why describing optical zoom as lenses on the camera being used to get closer to the object fits best—the magnification comes from the lens changing its optics. In contrast, digital zoom crops and interpolates the image to appear closer, which reduces quality. Simply increasing pixel count relates to resolution, not zoom. And while you could move closer to the subject, optical zoom doesn’t rely on changing your distance—the magnification comes from the lens changing its focal length.