Kirsty Fairweather Photography

A single photograph, captured on a Canon EOS 5D Mark III, offers a useful case study in how camera settings shape a final image. The file measures 5760 by 3840 pixels, an 11.8 MB JPEG in the sRGB colour space, last modified on 15 September 2020.

Shooting conditions

The exposure was made at 1/125 second at f/5.6, with the lens set to a focal length of 75 mm and a maximum aperture of f/2.8. Sensitivity was ISO 400, metered in pattern mode. Exposure compensation sat at 0 EV, the mode was automatic with aperture priority governing the programme, and the flash was not fired, though it remained in compulsory mode.

What the settings suggest

A moderate focal length paired with a mid-range aperture points to a considered, controlled composition rather than a snapshot. The shutter speed is fast enough to avoid obvious motion blur in most handheld situations, while ISO 400 gives a little headroom in softer light without introducing excessive noise. Pattern metering spreads the reading across the whole frame, which suits a scene with fairly even lighting.

The metadata is a reminder that the technical record of an image is often as revealing as the picture itself, documenting the decisions behind a fraction of a second.