September 29, 2016 at 6:41PM

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Metabones ULTRA speedbooster with a Sigma 50-100mm F1.8 Problem on Panasonic GX85

When zoomed out completely the aperture correctly shows F 1.2 at 50mm, however when I zoom in the aperture info on the camera shows an increasingly smaller aperture all the way to F4.0 when zoomed fully in to 100mm.

Does anyone else have this problem and is there a workaround?

3 Comments

Did you try to change the aperture by yourself?
That might be a software transmitting problem. If it's possible to get f/1.2 at 100mm it is less an problem than if f/1.2 wouldn't be available at 100mm.
Maybe just wait for some Metabones software update.

September 30, 2016 at 4:01AM

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Eric Halbherr
Director, DP, Editor, Creative Storyteller
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Hmmm, it is working now, perhaps the speedbooster needed time to register the lens.

September 30, 2016 at 6:29PM

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Cary Knoop
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IBIS works but you need version 2.5 of higher from Metabones.

Here is a clip using the Sigma 50-100 with the Metabones adapter at night, shot mostly at f/1.3

https://www.youtube.com/watch?v=0-E2-gf4Pc4

December 19, 2016 at 8:19PM, Edited December 19, 8:19PM

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Cary Knoop
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