Stop the confusion
QI’m trying to understand apertures. I read about some being a full stop and some not, but I’m confused… Sara Hardcastle
AThe following camera apertures are all full stops: f/2.8, f/4, f/5.6, f/8. f/ll and f/16. Each of these apertures (or stops) doubles or halves the amount of light getting through to the sensor compared with the adjacent stops. For instance, f/2.8 doubles the amount of light compared with f/4. However, f/5.6 halves the amount of light compared with f/4. Your camera will also allow you to change the exposure in half or third-stop increments for finer control over the exposures, but the apertures between those listed above aren’t full stops. For example, if you started at f/2.8 and worked up to f/4 in third-stop increments you would get f/2.8 (full stop), f/3.2, f/3.5 and f/4 (full stop). These settings can vary between cameras.