Aperture block failure on KS1
After many years, my KS1 got this issue. I thought it was lens related, as I only have one modern lens and the others are all full manual, but I found out my sigma 17-50 is fine. I bought a full manual wide angle (samyang 16mm) so that issue is solved, but I was wondering whether it's worth considering an upgrade to the KF. It costs 900€ where I live, and apart from this failure my KS1 is fine. What would be the pros of changing body?