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Old 27th December 2013
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Blackmagic MFT camera lens mount problem

Just before Christmas I met up with the owner of a Blackmagic video camera which use Micro Four Thirds lenses but his m.Zuiko 45mm f/1.8 wouldn't focus - manually or automatically. I noticed that the lens would not even lock into place on the lens mount and this is almost certainly what the problem was - the lens wouldn't rotate far enough in the mount to lock and this probably means the electrical communication pins were not aligned with the contact pads on the lens.

But bizarrely we tried a different lens (a 17mm f/1.8) and this worked fine... I wonder if anyone else has experienced this problem?

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Old 27th December 2013
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Re: Blackmagic MFT camera lens mount problem

I had a similar problem with some of my Fotodiox OM to 4/3 adapters. I had to depress the lens release to get the lens to rotate enough and lock.
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Old 27th December 2013
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Lightbulb Re: Blackmagic MFT camera lens mount problem

Quote:
Originally Posted by David M View Post
I had a similar problem with some of my Fotodiox OM to 4/3 adapters. I had to depress the lens release to get the lens to rotate enough and lock.
Ditto on one of my adapters. But I cannot see why even under close inspection of the mount, rotation stop pin or the elongated locking hole.

I do have a tiny mark on one that looks like the locking hole may not be quite deep enough and the pin hits the bottom of the hole on locking.

If I was investigating I'd look first at the depth of the elongated locking hole.
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Old 27th December 2013
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Re: Blackmagic MFT camera lens mount problem

But if the lens won't rotate far enough to engage the pin it shouldn't be that.
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Old 27th December 2013
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Re: Blackmagic MFT camera lens mount problem

I have had the problem with an MMF-2 on Panasonic G6
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Old 28th December 2013
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Blackmagic MFT camera lens mount problem

Quote:
Originally Posted by David M View Post
But if the lens won't rotate far enough to engage the pin it shouldn't be that.

Manufacturing errors are far more likely in hole depth and/ or diameter (worn tools) than position.

I'd put a cutter/drill in a pin chuck and make the hole a tiny bit deeper for the lock pin to go into fully.

If you have an extension tube with MFT Mount you may be able to look through it and see what's wrong. Although I don't think they make such a think in MFT Fitting ?
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