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

Automatic Autofocus (AF-A)

This setting is actually a combination of the first two. When selected, the camera focuses using AF-S and locks in the focus setting. But, if the subject begins moving, it will switch automatically to AF-C and change the focus to keep the subject sharp. AF-A is a good choice when you’re shooting a mixture of action pictures and less dynamic shots and want to use AF-S when possible. The camera will default to that mode, yet switch auto- matically to AF-C when it would be useful for subjects that might begin moving unex- pectedly. However, as with AF-S, the shutter can be released only when the subject at the selected focus point is in focus.

Manual Focus

With manual focus activated by sliding the switch on the lens to the M position, or the rotating switch on the camera body near the lens mount set to M, your D7000 lets you set the focus yourself. (Both the camera and lens settings must agree if you want to use an autofocus mode; when either is set to Manual, then only manual focus is possible.) There are some advantages and disadvantages to this approach. While your batteries will last longer in manual focus mode, it will take you longer to focus the camera for each photo, a process that can be difficult. Modern digital cameras, even dSLRs, depend so much on autofocus that the viewfinders of models that have less than full-frame-sized sensors are no longer designed for optimum manual focus. Pick up any film camera and you’ll see a bigger, brighter viewfinder with a focusing screen that’s a joy to focus on manually.

WARNING

Do not use a lens marked AF (rather than AF-S) when the focus mode switch on the lens is set to M and the switch on the camera is set to AF. As you’ll learn in Chapter 11, non- AF-S lenses do not have a built-in focus motor, and are focused by a motor in the camera body instead. When you set up the lens/camera in this conflicting configuration, it’s pos- sible the camera’s internal motor may try to focus the lens (which has been set for manual focus only) and, with some lenses, damage can occur to the camera’s focus motor. With AF-S lenses, the lens and body switches should agree, but no damage should occur if you have a mismatch; if either switch is set to M, then manual focus is what you will get.

If the lens mounted on your camera has a maximum f/stop of f/5.6 or larger, you can use the D7000’s electronic rangefinder feature to assist in focusing manually.

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Nikon D7000 manual Automatic Autofocus AF-A, Manual Focus
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D7000 specifications

The Nikon D7000 is a mid-range digital single-lens reflex (DSLR) camera that has garnered a reputation for its impressive blend of features and user-friendly design. Released in 2010, the D7000 marked a significant step forward for Nikon, appealing to both amateur photographers and enthusiasts seeking a robust and versatile camera.

At the heart of the D7000 is a 16.2-megapixel APS-C (DX) CMOS sensor that delivers sharp, high-resolution images with rich colors and stunning detail. Coupled with Nikon's EXPEED 2 image processing engine, the camera excels in low-light performance, allowing photographers to shoot at sensitivities ranging from ISO 100 to ISO 6400, expandable to ISO 25600. This flexibility empowers users to capture clean images even in challenging lighting situations.

The autofocus system of the D7000 is another highlight, featuring a 39-point AF system with nine cross-type sensors. This advanced system ensures fast and accurate focus, making it suitable for a variety of shooting scenarios, from portraits to fast-action sports photography. The camera also includes full HD video recording capabilities at 1080p, with options for frame rates of 24, 25, and 30 frames per second, providing videographers with quality and flexibility.

The D7000's build quality is robust, with a magnesium alloy body designed to withstand the rigors of regular use. It is weather-sealed to protect against dust and moisture, making it a reliable choice for outdoor shooting. The camera features a 3-inch LCD screen with a resolution of 921,000 dots, allowing for high-clarity image review and menu navigation. The 100% viewfinder coverage gives a true-to-life perspective when composing shots.

Additional features include in-camera HDR, multiple exposure capabilities, and a comprehensive set of scene modes that assist users in achieving the best results in various conditions. The D7000 is also equipped with dual memory card slots, supporting both SD and SDHC formats for ample storage and backup options.

With its combination of high-quality imaging, advanced autofocus, robust build, and versatile features, the Nikon D7000 stands out as a powerful tool for photographers looking to elevate their craft.
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