Instructions
Check your batteries and if necessary, insert a freshly charged battery into the battery compartment. The D300 functions best when the battery is at full charge.
Choose your lens. A good portrait lens allows the photographer to have maximum control over aperture settings. Remove the cover on the camera body's F mount lens mount system, and then insert the lens and secure it by twisting until the mount clicks.
Turn on the camera by rotating the switch on the top right of the camera to "On."
Select your shooting mode. The Nikon D300 offers a "Portrait" mode and also semi-automatic modes such as "Aperture Priority" and "Shutter Priority" that allow for more creative control.
Pose your subject and look through the viewfinder to compose your image. If necessary, take a meter reading and adjust the D300's settings to match the meter. You are now ready to take your portrait.