> yes but whats the best quality? AF s or AF d, any idea. i have been > told that the afd lenses are designed for the smaller chip size on most > cameras, so which is best?
AF-S lenses contain an integral motor to do the focussing and are therefore faster to focus. AF-D lenses feed the focus distance back to the camera where it's used for some flash and metering functions and are focused by the camera's "screwdriver". All AF-S lenses are also AF-D. AF-S _may_ be bette quality, but they are definitely wider maximum apertures. Neither were designed specifically for small sensors. The Nikon DX lenses _were_ designed for small sensors and will vignette on a 35mm (or full-frame digital), particularly at the wide zoom settings. Peter =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
