Good results from a fast lens.
No doubt the Canon 55 1.2 is an excellent lens.
Like you I am often tempted to use lenses from other makers on my Pentax bodies.
So far I left it cowardish to a couple of Sigma lenses factory fitted with K mounts.
Both Sigma lenses I own, the 17-50 2.8 and the 18-200 are good performers.
---------- Post added 07-29-20 at 12:10 PM ----------
Originally posted by RussV Looking elsewhere on the net, some suggest there might be a capacitor instead. Which still doesn't answer your question, either way it may not be fixable.
No doubt it can be fixed.
The question is what will it cost.
The average price I paid for the three K10d bodies I got is 60 euro.
That includes the low clicks, only 3900, number 3 body.
Number 1, the body with the date back up problem is my favorite body to use out doors.
No need to change the battery often. Resetting the date refreshes my memory using the menu too.