Originally posted by onesikej8 if the k series lenses are the ones that are fully compatible with my camera, why is the one that came with it a DA L? i am real sorry, like I said, noob here with SLRs
Not K series, K-mount. All Pentax lenses manufactured since 1975 are K-mount, with the exception of the Auto 110 lenses.
Pentax K mount - Wikipedia, the free encyclopedia
The "K" series were the first K-mount lenses produced by Pentax in 1975. They were followed by the M series in 1976 and the A series in 1983. The M series were smaller than the K series and the A series introduced automatic aperture control. On the K-r the K & M series lenses use stop down (Green Button) metering.
The first successful Pentax autofocus lenses were the F series in 1987, followed by the FA series in 1991. The DA series are designed for digital SLRs and were introduced in 2004. The DA Ls are optically the same as a DA lens but they lack several features and have a plastic mount.