Coded lens showing as uncoded

[ben]

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M10 with the most current Cron 35/2 ASPH

Sometimes when turn the camera on, "uncoded" shows on the LV screen.

I'll hold the lens release, unscrew the lens slightly then re-attach it and it's once again recognized as 35/2 on the LV screen. 

[hteasley]

Take a lens wipe to the coding sensor on the mount. It might be a little dirty.

[adan]

...and check the "dots" themselves on the lens. A bit of dark "stuff" in one of the white dots can mess up the reading.

[250swb]

On 1/17/2019 at 4:15 PM, ben said:

M10 with the most current Cron 35/2 ASPH

Sometimes when turn the camera on, "uncoded" shows on the LV screen.

I'll hold the lens release, unscrew the lens slightly then re-attach it and it's once again recognized as 35/2 on the LV screen. 

It says 'uncoded' for a period of time (or permanently)?  What does the EXIF show if you take a photo and don't unscrew the lens? My first thought was that if it's a momentary thing leaving the camera in LV mode it's simply taking a little longer to fully wake up.

[nlk10010]

On 1/17/2019 at 11:15 AM, ben said:

M10 with the most current Cron 35/2 ASPH

Sometimes when turn the camera on, "uncoded" shows on the LV screen.

I'll hold the lens release, unscrew the lens slightly then re-attach it and it's once again recognized as 35/2 on the LV screen. 

You may already know this, but I had that problem with certain lenses until I realized that I hadn't rotated them firmly into position (I looked at that little lever next to the lens mount to make sure it had moved all the way). I had the same issue in the field when I switched lenses on the fly; pictures came out OK (well, at least as well as they normally do when I take them) but the EXIF didn't show the lens type. I probably was a bit hasty and didn't rotate the lens completely into position.

Of course, yours could be a completely different problem (my symptom was the LED menu indicating a non-coded lens), but I just thought I'd chime in.

 

[ben]

Thanks everyone. I cleaned the dots and area around the mount with a little lens wipe and it seems to have solved the problem!

[Photon42]

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Sounds good. I actually did have an issue with the bar code reader of my MD, right out of the gate. The reader more often than not was unable to read the lens code. The camera got replaced. Needless to say this is the last thing you want on a camera with no LCD.