Noise spots on long exposures

Started Jul 23, 2014 | Questions thread
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Noise spots on long exposures
Jul 23, 2014


Long time reader, first time poster... with a big thanks to the community.

I own a Sony Nex 6 and noticed that long exposures show blemishes that are not visible on short exposures (see picture). I don't know when this started, but it wasn't always the case. Also, I'm quite sure it occurred with several lenses, so the issue seems to be with the camera. I used the built in sensor cleaning function, but to no avail. Any ideas as to the reason and what I could do about it? Going for a short trip to Acadia this Sunday and hoping to have it fixed by then.

Here's an example - you'll see it especially in the sky:

Mono Lake

Thank you!

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