Dead AF on DFA* 1.4

Started Jan 4, 2019 | Discussions thread
DougOB Senior Member • Posts: 1,843
Re: Dead AF on DFA* 1.4

Adam007 wrote:

Hi, All:

While traveling with the normally stellar 50 1.4 and my K-1, the autofocus has suddenly failed. When I mount the lens, I get the manual SR focal length input screen, which quickly disappears (this is new). Then, the display screen reads “MF” regardless of the AF/MF switch positions on the lens and body. I’ve tried my other lenses; AF Is fine. Wiped off the 50’s contacts; no dice. This seems extremely odd for a Les that’s just a couple months old. Any thoughts? Hoping to use it for portrait sessions on the trip, and a little bummed.

Thanks for any insight!


When mounted does it act like a K/M lens (M mode only) or an A lenses (M, Av, Tv, P modes)?


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Pentax K-01 Pentax K-3 Pentax Q-S1 Pentax K-70 Pentax KP +32 more
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