Originally posted by jeryst Interesting that this is another example of something not working on the K-5
family, but working on the K10D-K20D family mounts.
The camera-side fit is spring-loaded on all K-mount cameras. I have a pretty good selection on my shelf and some lenses fit tight on all bodies with some being fine on all and some being tight only on a few. None fit loose.
Addendum...those that fit tight on all bodies fit tight on my K10D when I still had it.
Addendum II...My Soligor (made in Japan) extension tubes fit loose on three of my bodies, tight on one (Pentax KX*) and properly on my K-3 and Ricoh XR-2s.
Steve
* Original series K-mount, circa 1976
Last edited by stevebrot; 12-28-2017 at 09:57 PM.