Hello Mike, beachgardener here, just thought to let you know, I am interested in the Vivitar 85 f1.8 pre-set T mount, I suppose that means I'd need a T mount adapter (although the last review on that page had luck giving it a K mount conversion I think),
Vivitar 85mm F/1.8 Pre-set T-mount Lens Reviews - Vivitar Lenses - Pentax Lens Review Database
One other is the 28mm Komine
Vivitar (Komine 28xxxx) 28mm F2.0 MC Close Focus Wide Angle Lens Reviews - Vivitar Lenses - Pentax Lens Review Database The 105 and 90 bokina are on the list, but unfortunately just out of my budget for the present, maybe later on. Maybe the 400mm f5.6 too.