Lenses
Unlike previous Nikon cameras, the D40X does not use a built-in focus drive motor. This means that the number of Nikon autofocus lenses compatible with the D40X are limited. The D40X cannot autofocus with a Nikon lens unless it has its own drive motor. Lenses with the drive motor built in include the AF-S and AF-I lens series. AF DX and AF Nikkor lenses will not work with the D40X.
Function Wheel
Like many Nikon cameras, the Nikon D40X has a number of preset functions. These may be set by turning the function wheel on the top of the camera just behind the shutter button. Each pre-set function changes the camera's settings to those pre-determined for a particular photography condition. These preset photography conditions correspond to an icon on the function wheel.
List of Preset Functions
The green camera is a fully automatic mode. Other modes include portrait, landscape, night time or back-lit photography, close-up photography, action and children's portrait photography. There are also controls to turn the flash off as well as setting the camera to shoot photos in a completely manual mode and a shutter and aperture priority mode.
Lighting Sensitivity
Compared to the D40, the D40X has a slower synch speed for the flash and less light sensitivity in everyday use. To overcome the lighting sensitivity, you should invest in a Nikon Speedlight, rather than rely on the built-in flash. This can make a significant difference in photo quality for low-lighting conditions and indoor pictures.
Use of Off-Camera Flash
A Speedlight can be used to bounce the flash off low-hanging ceilings by turning the flash directly upward to give a softer, more indirect lighting effect. Additionally, the Speedlight can be set for a through-the-lens (TTL) metering system that self-adjusts to the camera's settings for lighting that is never too bright for the photograph.