bcorton Posted November 25, 2015 Share #1 Posted November 25, 2015 Advertisement (gone after registration) Yesterday I was out with my T and had on it the 18-55 zoom. For no apparent reason it froze: black screen save for the icons on the top and right (the same screen one would see if one switched on the camera with the lens cap on, but in this case it definitely wasn't on--just to spare anyone the trouble of jumping to that conclusion). I switched the camera off and nothing happened; the screen remained unchanged. On again. No change. Replaced battery. Nothing. Same black screen with icons. Finally, I moved the zoom setting of the lens slightly and heard a faint click, and everything came back online. Has anyone ever had something similar happen? And what would cause it? Brent? Link to post Share on other sites More sharing options...
Advertisement Posted November 25, 2015 Posted November 25, 2015 Hi bcorton, Take a look here Strange happenings. I'm sure you'll find what you were looking for!
Guest Posted November 25, 2015 Share #2 Posted November 25, 2015 I have had similar once or twice. However in my case removing or even just unblocking the battery and then pushing it back in, brought all back to normal. Link to post Share on other sites More sharing options...
bencoyote Posted November 25, 2015 Share #3 Posted November 25, 2015 On an OS level what is likely happening is the camera is triggering some action, probably in the lens and then it is waiting for some sensor data saying that the action has actually taken place. Something likely got stuck and it didn't happen and so the UI froze outside of the event loop which processes other events. I'd call it a buglet, the code should probably have a timeout that says, if you haven't heard from the sensor in X microseconds, send the command again and increment an error count. If the error count exceeds Y, issue a lens error. Call this a lesson from Robot Programming 104: detecting and dealing with the fact that things don't always do as they are told. From your perspective, if this happens very occasionally like once in a blue moon don't worry about it but if it happens repeatedly and it becomes a frequent occurrence then you might need to get your lens serviced. The problem is that shipping it would likely jiggle the thing loose making the lens seem perfectly fine by the time someone actually looked at it. It is getting near winter up here in the Northern Hemisphere how cold was the lens when this happened? Eventually, if a bunch of lenses go bad and fail to respond to the control commands locking up the cameras, then Leica might be able to diagnose which lens control command is failing and they will be able to fix the buglet in their firmware. If they are really smart, they will have a little bit of NVRAM in the camera and in the lens where they will log the "failed to respond to XXX command within Yms" into a circular buffer. That way when they get the lens or camera into be serviced they can dump the log and see some number of errors and have a good idea of what is wrong with it. (but practically no one is that smart) Link to post Share on other sites More sharing options...
bcorton Posted November 26, 2015 Author Share #4 Posted November 26, 2015 Ben, Thanks. That makes sense. I believe the outside temperature was around 50-degrees Fahrenheit. Dry and sunny. Brent Link to post Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.