Nikon D7000 manual Lens Components

82David Busch’s Nikon D7000 Guide to Digital SLR Photography

■Image Quality (dark orange). Shows current image quality, including JPEG, RAW, and RAW+JPEG Fine, Norm, or Basic.

■Secure Digital indicator (gray). Shows when a card of either type is inserted in the camera.

■Autofocus-area indicator (dark red). Displays the autofocus area status, with the active focus zone shown from among the 39 available points.

■Autofocus mode. Shows whether AF-A, AF-S, or AF-C focus modes are active.

■ISO indicator (brown). Displayed when you’ve set the D7000 to adjust ISO for you automatically.

■GPS active (pink). If you have a GPS device attached and working, you’ll know it when this indicator shows up.

■Interval timer active (pink). When using the D7000’s interval timer facility (as described in Chapter 8), this indicator appears.

Lens Components

The lens shown at left in Figure 3.31 is a typical lens that might be mounted on a Nikon dSLR. Unfortunately, this particular lens doesn’t include all the common features found on the various Nikon lenses available for your camera, so I am including a second lens (shown at right in the figure) that does have more features and components. It’s not a typical lens that a D7000 user might work with, however. This 17-35mm zoom is a pricey “pro” lens that costs about half as much as the entire D3100 camera. Nevertheless, it makes a good example. Components found on this pair of lenses include:

■Filter thread. Most lenses have a thread on the front for attaching filters and other add-ons. Some, like the 18-55 VR kit lens shown, also use this thread for attach- ing a lens hood (you screw on the filter first, and then attach the hood to the screw thread on the front of the filter). Some lenses, such as the AF-S Nikkor 14-24mm f/2.8G ED lens, have no front filter thread, either because their front elements are too curved to allow mounting a filter and/or because the front element is so large that huge filters would be prohibitively expensive. Some of these front-filter-hos- tile lenses allow using smaller filters that drop into a slot at the back of the lens.

■Lens hood bayonet. Lenses like the 17-35mm zoom shown in the figure use this bayonet to mount the lens hood. Such lenses generally will have a dot on the edge showing how to align the lens hood with the bayonet mount.

■Focus ring. This is the ring you turn when you manually focus the lens, or fine- tune autofocus adjustment. It’s a narrow ring at the very front of the lens (on the 18-55mm kit lens), or a wider ring located somewhere else.