- наличие возможности тонкой подстройки автофокуса (я не совсем понял смысл этой фичи, но, подозреваю, что владельцы новых камер смогут самостоятельно исправлять такой бич, как фронт- и бэк-фокус).
Вы совершенно правы - эта штука действительно позволяет с этим бороться, причем поправки запоминаются для 10-ти объективов.
С сайта www.imaging-resource.com:
Fine-tuning. If we've discovered anything reviewing lenses on SLRgear.com, it's that lenses and bodies don't always match. Sometimes they focus in front of the subject, sometimes they focus in back of the subject. Camera companies are starting to acknowledge this, building in adjustments to compensate for front- and back-focusing problems. The Nikon D300 has a new system that just does that, but unlike the D200 it doesn't just work for the body side of the equation. Sometimes it's the lenses that are out of tune too, so adjusting just the camera's AF to work well with one lens won't solve the problem with another; indeed it can make other lenses worse.
So the Nikon D300 has a new system where the camera can store adjustments for up to 10 lenses. Not individual lenses by serial number, mind you, but at least by type. If you have only one of each type of lens, say a 50mm f/1.4 and a 100mm f/2.8, you'll have no problem. But companies that have several of one type of lens, like a few 300mm f/2.8Gs for shooting road races, the camera will only load compensation information for the lens that was mounted when the compensation was initially set for that type of lens.
хорошая инвестиция в будущее это покупка акций гугла 
))
