With low-light performance getting better all the time and Vibration Reduction offering up to four stops of extra wiggle room, now seems like as good a time as any for teleconverters to make a serious comeback. Nikon's newest extender is the world's first to include an Aspherical lens element, which they claim helps prevent loss of image quality. Using it will cost you two stops, but it's compatible with all of Nikon's latest VR, metering and autofocus systems. It's being announced in conjunction with their new 300mm F/2.8 VR II and the combination of the two represents a pretty formidable 600mm F/5.6 weapon for sports photographers or anyone in need of a long lens that lets in a lot of light. Even if you're not sitting ont he sidelines of pro sporting events, adding a high-quality teleconverter is a great way to increase the versatility of your AF-S lens collection, without taking too much bulk out of your wallet and inserting it into your camera bag.