What are the sources of these lines?

[dritz]

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Full frame image, then 100% CU. ASA 1250. The horizontal lines are not in every shot... just some of the shots. These appear when viewing the DNG in Lightroom 5.3 and in Photoshop Raw import. I'm using a brand new SanDisk Extreme 32GB (HC1).

 

What gives?

Thanks.

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[lct]

Looks like banding. Tends to show up on underexposed images. Did you push exposure in PP?

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[dritz]

Looks like banding. Tends to show up on underexposed images. Did you push exposure in PP?

 

No deliberate post processing at all. I open the DNG files in lightroom, PowerPoint, and Preview. The banding appears. Based on your inquiry, I went back and looked at some of the in-camera-produced jpegs (B&W). The banding is on adjacent DNG files but not the JPEG files. Unfortunately, I don't have DNGs that go along with the jpegs.

 

Banding.... hmmm.

 

Dean

[Dougg]

The vertical line about 1/4 the way from the right edge is likely a bad pixel affecting the column. The horizontal line... I have not seen an odd one like that..

 

Doug

[Michele Belloni]

I notice today the same problem.

 

Leica M8, 1250 iso. Only in some shot so I think is not a phisical sensor problem... something like amped signal.

 

Anyway I'm trying right now to replicate the shot in same situation and iso/f.stop/time.

 

Nothing... it doesn't come out.

 

Forgive my bad english guys.

 

Mike

Edited January 8, 2014 by miky

[dritz]

Thank you for investigating. I have not been able to reproduce it, but then I really don't want to see it again! So, I have decided to stay with 640 and push in post processing, if necessary.

 

Regards,

Dean

 

 

I notice today the same problem.

 

Leica M8, 1250 iso. Only in some shot so I think is not a phisical sensor problem... something like amped signal.

 

Anyway I'm trying right now to replicate the shot in same situation and iso/f.stop/time.

 

Nothing... it doesn't come out.

 

Forgive my bad english guys.

 

Mike

[Michele Belloni]

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Maybe it was an electromagnetic interference or so. I can't imagine what did produce this effect but seems something about electronic.

 

I love 1250 iso on Leica... it has a real grain look and pushing it from 640 scares me.

 

Keep me updated with futures problems please about these bands. Thanks.

[Michele Belloni]

I've found the solution. You need to have your battery fully charged and shutter set to normal mode instead of discrete. The problem is a power need that exceed the original electric scheme. The low battery and discrete mode are the cause. Try to fully charge your battery and back to normal shutter. It works at any ISO, any situation.

[dritz]

I've found the solution. You need to have your battery fully charged and shutter set to normal mode instead of discrete. The problem is a power need that exceed the original electric scheme. The low battery and discrete mode are the cause. Try to fully charge your battery and back to normal shutter. It works at any ISO, any situation.

 

Ah, this might be related to what seems to be a defective charger. I have a replacement charger on the way and will try out your suggestion.

 

Thank you for your research work.

Dean

[Michele Belloni]

Ah, this might be related to what seems to be a defective charger. I have a replacement charger on the way and will try out your suggestion.

 

Thank you for your research work.

Dean

 

Hi Dritz! I don't think this might be related to a defective charger for two reasons:

 

1) My bateries are always in perfect shape and excellent (relatively) lasting performance

2) This issue come out only with discrete shutter AND a medium to low battery level

 

Anyway the real problem is shutter mode.