Originally posted by detritus its only fun to play with old lenses up to a point. i have a few good ones myself and i do use them from time to time. but i hope for pentax to be a forward looking brand with a solid line of CURRENT products, not legacy products.
But there's something you aren't factoring in. Consider how few of the large number of lenses that were made for, or are adaptable to, K mount have attained legendary status for quality.
The quality of FA Limiteds and to a lessor extent the DA Limiteds, for example, are not seen in every generation of new lenses; and there's just one Zeiss 21mm, or Voigtlander 125, or Leica R 50mm f/2 Summicron, or Pentax A 85 f1.4, etc. (I'm sure the experienced photographers here can add a few more to the list). The ability to not have to settle for consumer quality lenses is the number one thing that keeps my interest in photography equipment. And LBA is no small issue, as you can see here. Excepting the sensor, what mechanical aspect is more important than glass to picture quality?
So it isn't just "old" or legacy per se that means anything . . . it's that it seems a truly great lens is not so easy to produce (or the commitment isn't there from manufacturers). If the past is an indicator of how often we'll see Limited-quality lenses, then a new lens mount only promises to reduce things to consumer photography for many years.