Bmpcc4k losing connection to Olympus 12-100 lens

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Brian Nager

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Bmpcc4k losing connection to Olympus 12-100 lens

PostTue Apr 16, 2019 9:44 pm

Hi everyone!

I have intermittent problems where the Bmpcc4k loses connection with Olympus 12-100 lens. The autofocus won’t work (IS will) unless I turn camera off and then on again. That’s the fix.

Also, when this happens, whether the focus by wire is engaged or the (fake?) manual clutch, neither will focus. Focusing by hand or by app or by screen do not work.

Just curious if anyone else has had this problem?

I’m running firmware 6.1

Thanks!
Brian


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Nick Lavigne

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Re: Bmpcc4k losing connection to Olympus 12-100 lens

PostWed Apr 17, 2019 1:42 pm

Disconnect the lens then put it back on. when in correct position press and release the lens release. That worked for me.
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Robert Niessner

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Re: Bmpcc4k losing connection to Olympus 12-100 lens

PostThu Apr 18, 2019 11:34 am

Brian Nager wrote:Hi everyone!

I have intermittent problems where the Bmpcc4k loses connection with Olympus 12-100 lens. The autofocus won’t work (IS will) unless I turn camera off and then on again. That’s the fix.

Also, when this happens, whether the focus by wire is engaged or the (fake?) manual clutch, neither will focus. Focusing by hand or by app or by screen do not work.

Just curious if anyone else has had this problem?


Yes, I am having that problem from time to time. But I can still focus by hand regardless of the position of the clutch. I think it has something to do with the contact points of the mount but I have not found a way to reproduce the behavior at will (which would make it possible to find a fix).
Robert Niessner
LAUFBILDkommission
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Brian Nager

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Re: Bmpcc4k losing connection to Olympus 12-100 lens

PostThu Apr 18, 2019 3:13 pm

Thanks for your replies! Yeah, I can’t reproduce at will either. I’ll try detaching and reattaching lens to see if that fixes it. Is this to be attempted while camera is on or off?


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Robert Niessner

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Re: Bmpcc4k losing connection to Olympus 12-100 lens

PostThu Apr 18, 2019 3:20 pm

Brian Nager wrote:Thanks for your replies! Yeah, I can’t reproduce at will either. I’ll try detaching and reattaching lens to see if that fixes it. Is this to be attempted while camera is on or off?


Normally it is better to turn off camera before detaching the lens.

As far as I remember the issue appeared most of the time when I was doing handheld work and did operate the lens all the time - so it might be a mechanical problem. My MFT mount has a bit of wiggle room in it.
Robert Niessner
LAUFBILDkommission
Graz / Austria
---------------------------------------------------------------------
Blackmagic Camera Blog (German):
http://laufbildkommission.wordpress.com

Read the blog in English via Google Translate:
http://tinyurl.com/pjf6a3m

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