For fast and whisper quiet autofocus operation, the new Nikon 40mm Micro lens also features Nikon’s exclusive Silent Wave Motor technology, which allows photographers to get even closer without disturbing a subject. For complete control, the AF-S DX Micro NIKKOR 40mm offers users both manual-priority autofocus (M/A) and manual focus (M) modes to quickly and easily switch focus modes on the fly. To help ensure amazing lens performance at close distances, this new lens employs Nikon’s Close-Range Correction System. With this system, the lens elements are configured in a "floating” design wherein each lens group moves independently to help achieve critical focus. Additionally, Nikon’s Super Integrated Coatings are applied to help reduce instances of lens flare and ghosting. The seven blade diaphragm also helps to create a more natural out of focus component.
I'm very sure...
Also from the 18-55 VR page, the 18-55 VR being one of the cheapest lenses they offer:
Nikon's exclusive Silent Wave Motor (SWM) ensures fast, quiet auto focus operation.
http://www.nikonusa.com …mm-f%252F3.5-5.6G-VR.html
Right side, Second from bottom
AF-S means SWM, Period, Their micromotor driven lenses have an AF-I designation and have not been made in a long time, they were only used in the very very big telephotos because Nikon's in-body motor simply couldnt drive a 500mm f/4 lens' focus group effectively compared to the Canon competition, the AF-I lenses are considered utter crap however last I checked because they're not terribly fast focusing either and they didnt last long on the market...
Perhaps what your friend means is a silent-wave micromotor, Similar to Canon's Micro-USM thats used in the 50mm f/1.4 and that..Its still a type of SWM however
RobDickinson wrote in post #12764532
A nikon expert friend is pretty sure they do use micromotors and af-s does not designate silent wave.
Also, From Nikon's site, in case i needed even more proof of this:
AF-S: Autofocus Silent Focusing is driven by a "Silent Wave" motor in the lens instead of the focus drive motor in the camera. AF-S lenses focus faster than standard AF-NIKKORs and almost completely silently.
So yes, AF-S = Silent Wave Autofocus and your "Nikon Expert" friend is wrong