So this weekend my 24-120vr F4's aperture stopped opening all the way up mid sitting and of course it was too dark to AF. I fiddled with it, switched lenses, and the next day it worked correctly but then again in mid sitting, the aperture closed down again. It didn't do it with any other lenses, so I'm running with the body not being the issue.
Has anyone seen this before? New one to me. I have never had them work, stop working, and then work again the next day. Just odd.