Originally posted by Bertrand3000 On your K20D and your K100D, are you able to use other auto focus lenses ?
Yep, all of my other lenses (a DA* 55mm 1.4, the kit lens from the K100, and three Sigma DG's) work perfectly on those cameras. I have a brand new DA 35mm set to be delivered from Amazon today, so I'll be able to try it out to see if the problem is with this copy of the lens, or a problem with the older bodies.
I feel bad about the ebay transaction, though, since the seller has already refunded my money and told me not to bother returning the lens since it seems to be broken. I'd like to figure out how to make it work on the older bodies (if possible), return the Amazon lens, and give the money back to the seller. Otherwise, my plan is to try to sell the lens to someone with a newer body (especially if I can do it local and verify that the lens works on the body) and give the money to the seller.