As we're only two weeks from the big EAA air event at Oshkosh, my 18-250 (on a K10D) has decided it won't focus. It generally just saws back and forth a few times and then gives up.
This is true regardless of center vs. select vs. whatever. True in good light and medium light, indoors or outdoors.
My Sigma 10-20 and 17-70 seem to work fine on that body.
But that's left me without a long lens for my biggest photo event of the year - the primary reason for the K10D's purchase last September. Yikes!
Does anyone have any bright ideas on what can be done short of a stay at the lens hospital? Last time it took about three weeks - weeks I don't have. I'm not suggesting that I learn lens repair but I'm wondering if there is some error or condition or setting I've simply overlooked. I'm pretty good at ignorance.
Thanks in advance for your help and/or sympathy, my friends.