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You don't yet understand the issue.Also... Don't over look the fact the D7000 has a built in focus motor giving you a LARGER option of lenses. IMHO, i would never buy a body without the focus motor.
Yeah, also swinging me towards the 7k....will also make lens choice cheaper not having to rely on an AF one...
Nikon makes AF-S lenses that have an auto focus motor right in the lens (-S). Most of Nikon's AF-S lenses are relatively inexpensive consumer grade lenses. Quite a few of the AF-S lenses also have VR (Vibration Reduction) which adds considerably more cost to an AF-S lens than a built-in AF motor does.
Nikon makes older AF designated lenses that auto focus, but there is no auto focus motor in the lens. The lens focus mechanism has to be driven by a motor and screw-drive system that is in the camera.
Most of those older AF designated lenses are still pretty pricey because they are previous generation pro grade lenses.
Additionally, advances in lens glass making/coatings, lens electronics, and lens design have also added to the cost of the newer AF-S lenses when compared to the older AF lenses.