Thanks Allen.
On the practical side: I am located in Europe.
Most items offered on buy and sell here tend to come from the US and Asia.
Importing from outside the EU is unattractive due to shipping costs and duty.
Evilbay is my main hunting ground now.
Unlike other 35 mm gear older Pentax lenses are still getting decent prices, even looks like prices are increasing.
That is a reward for staying with the same mount since the 42 mm era and great lens designs from the seventies.
With the APS sensor only the sweet spot from the lens is used giving excellent IQ.
Those lenses with less elements/groups are my favourites.
Talking about older gear: for wide angle nothing beats the Carl Zeiss Biogon design from Ludwig Bertele.
He calculated the Biogon lens with simple means in 1935 resulting in a near perfect symmetrical design.
Distortion is less than 0,1%. Solution exceeds most films.
Attached an image from a new powerplant. Camera/lens is Hasselblad 903SWC, recording medium Hasselblads 50 Mp digital back.
The back goes well with a 500C body from 1957 and 60 mm Distagon lens from the sixties. How is that for compatibility?
Can't help it, I like older quality gear amongst which I also count Pentax bodies and lenses from the seventies.
Paul