50mm lens for my K-5?

Both the 35/2.4 and 50/1.8 have QS according to this cataloigue: indeed, of the currently listed lenses the 18-270 is the only one without QS (the DA14/2.8 isn't listed; nor are the FA Limited series).

....Which goes to show, don't believe everything you read! The DA 35/2.4 certainly does not have quickshift. In this age of data saturation and instant information its becoming rather apparent that we can nolonger trust webpage details.