Is this dust in my M43 Images?

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mtar925
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Is this dust in my M43 Images?
1 month ago

Any help figuring out what this dark streak is on images coming out of my Panasonic GX7? I've heard of dust being a problem on M43 sensors - and digital in general. But this thing only appears sharp at small apertures - I'd think dust on the sensor would be sharp at all f-stops? Maybe it's inside the lens? Pictures of a white board attached to show the streak at various apertures. All taken with the 14-42 kit lens MkII.

I've already used the in-camera Sensor Cleaning feature a couple of times, and blown the sensor off with a blower bulb a couple of times, to no avail. Also blown off the back element of the lens. If it is dust on the sensor - what do I do next, to clean it without damaging it?

Thanks for any help!

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Matt in CA

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 mtar925's gear list:mtar925's gear list
Panasonic Lumix DMC-GX7 Olympus M.Zuiko Digital 45mm 1:1.8 Panasonic Lumix G Vario 45-150mm F4-5.6 ASPH Mega OIS Panasonic Lumix G Vario 14-42mm F3.5-5.6 II ASPH Mega OIS
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