GH4 still - Is this normal artifacting?

[jurgen]

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[jgharding]

I don't own this camera, but when you push up to ISO25600, then maximise clarity I'd expect lines from the sensor to appear.

 

Actually I'd expect it to be worse!

[Guest Ebrahim Saadawi]

You cropped a portion of the image, pushed it by two stops, maxed sharpness, and don't expect to get artefacts like this?

I would say it's normal, unless they appear in normal shooting conditions. Do they?

[dahlfors]

Never seen such a line when pushing it on Nikon cameras - just more random noise. So, this is very dependent on sensor/processing tech.

 

Anyway, for stills, I doubt it will be an issue. There are serious banding issues on some cameras, I wouldn't say this looks too serious. Even in a large print, I doubt you'll notice it, and for screen use when you resample down, it won't be much noticeable. Easily fixed in Photoshop if needed.

[jurgen]

You cropped a portion of the image, pushed it by two stops, maxed sharpness, and don't expect to get artefacts like this?

I would say it's normal, unless they appear in normal shooting conditions. Do they?

Not to my eye, no. I've tried to provoke it a bunch of times and can't seem to recreate the issue. The first time I saw it, I was trying to save an actual photo shot at ISO 4000 by pushing it a bit. I've since gone back and looked through all my other high ISO photos and it isn't there (and isn't provokable).