Ohh its nice!! Well built, pretty and small!
Very minty! I paid a bit much for it just to be able to wallk into my local brick and mortar to get it.
Its in fantastic shape, and best of all it is the Version II of the lens, which means it has the SMC-A optics and even seems to work in Av mode in terms of the camera adjusting shutter speed.
Getting used to MF, catch in focus is great! Although seems to be finicky, likely the way im setting things.
Otherwise seems to be very sharp, nice/interesting bokeh and character.
Price aside (I know I paid about $40-50 too much) did I pick a nice first MF walkaround lens for my K-r?
"This lens is extremely interesting. Its lens mount is of the "original K-mount" type, and its name associates it undoubtedly with the M-series of K-mount lenses. On the other hand, the lens shares its most important characteristics with the later SMC-A lens: the linear aperture mechanism and the updated optical formula. Even the focusing ring is of the A-style.
Guesses can be made that in 1982 Pentax was already hard at work developing the A-series bodies and lenses, and when parts for the "original" M 28/2.8 lens were depleted, it was decided to switch to production of the new lens, but without exposing the externally visible A-series features — electrical contacts on the lens mount and "A" position on the aperture ring. Still, this lens with its low production numbers is a rather unique piece of K-mount history."
http://kmp.bdimitrov.de/lenses/primes/wide-angle/M28f2.8-ii.html