Mastering the Nikon D300

2.13. A - Aperture Priority Auto Mode

Nature and macro shooters, and anyone concerned with carefully controlling depth-of-field, will often leave their D300 set to Aperture Priority Auto mode (A). Figure 8 shows the A for Aperture Priority Auto mode followed by the shutter speed and aperture to the right of the A.

A-Aperture Priority Auto mode lets you control the aperture, while the D300 takes care of the shutter speed for optimal exposures. With newer AF-S and G lenses, to select an aperture you'll use the Sub-command dial. You can control the aperture from maximum to minimum just by using the Sub-command dial on the D300.

A Note on Lens Types If you use an older AF lens with an aperture ring, set it to the smallest aperture on the lens, ...