banding?

[fishblimp]

Advertisement (gone after registration)

Does the blue area of the light (on the wall) of this photo seem a little like it's banding to you? I took this with my M8.2 50mm Summicron. Is there a simple test that one can do to see if their camera is banding?

[jaapv]

I do not think you are seeing any banding here; the effect, imo, is caused by the light source and you just did not notice it when taking the picture. A camera is much more exact than the human eye in this respect.

I do notice, however, that you must have done your postprocessing in 8 bits. The image shows clear signs of posterizing. Always convert your DNG to 16 bits and do at least your levels, curves and contrast control in 16 bits, converting down to 8 at the very last possible moment.

[Advertisement]

The Leica Q3 is available for pre-order at B&H Photo Video and Adorama

[fishblimp]

thanks for the heads up. I have just started to use Lightroom and I am still figuring out the process. I did export this image (the one in my post) as a .jpg, perhaps that's where it shifted?

[jaapv]

The end export for the web should be Jpg, that is correct, but during postprocessing, 16 bits is preferable. Transporing the files between programs (for instance from C1 into LR or Photoshops) should be don in 16 bits TIFF files.

[akiralx]

The end export for the web should be Jpg, that is correct, but during postprocessing, 16 bits is preferable. Transporing the files between programs (for instance from C1 into LR or Photoshops) should be don in 16 bits TIFF files.

 

Thanks for this - the issue I have had is converting DNGs within Photoshop Elements 6 is that in 16-bit I cannot then save as a jpg, as mentioned. How do I convert down to 8-bits before saving after employing levels, sharpening in Photoshop etc?

 

Cheers

 

Alex

[jaapv]

First you do all that you can in 16 bits, then you change to 8 bits and then you save as jpg.

Btw, convert in aRGB, keep that throughout your workflow and only change down to sRGB at the very end for web output.

Remember that colourspace changes downwards are destructive and cannot be reversed.

[sfokevin]

Advertisement (gone after registration)

I think you problem is above our pay grade...

I would submit your photo here:

Visions of Jesus Christ.com - Miraculous Images

[j_lir]

it will be easier to see in a 100% crop,

but is it to the right of the blue light?

maybe im just used to seeing banding on my frames....

 

but id like to see a 100% crop.

the m8.2 loaner leica sent me exhibited some banding...

 

thanks

[akiralx]

First you do all that you can in 16 bits, then you change to 8 bits and then you save as jpg.

Btw, convert in aRGB, keep that throughout your workflow and only change down to sRGB at the very end for web output.

Remember that colourspace changes downwards are destructive and cannot be reversed.

 

Thanks, I've found how to change to 8 bit at the end of my workflow.

 

Should I have the M8 set to aRGB too? Though this is only for shooting jpg, I believe.

[Jamie Roberts]

Alex, the posterization (not banding) is probably due to overexposure. No change in bit depth will rescue the image.

 

If you clip a channel (and I'm thinking the blue channel here is well and truly clipped) then it's up to the RAW program how it deals with that. Some do well in some situations, and some don't.

 

So I'd say you have a LR problem with the clipping, not strictly speaking an M8 problem.

 

I don't suppose you want to post the RAW file so we can have a look? If you don't have your own server, you can use yousendit.com to let us download it.... Just send the file to yourself at YouSendIt - Send large files - transfer delivery - FTP Replacement then post the URL they send you here.

[sbelyaev]

I have similar problem with original M8 (firmware 2.002). For some reasons, sometimes, the camera has very hard time with tonal transition at the interface of zone 1 and 2.

I guess it could be corrected in a new firmware.

[sbelyaev]

I have similar problem with original M8 (firmware 2.002). For some reasons, sometimes, the camera has very hard time with tonal transition at the interface of zone 1 and 2.

I guess it could be corrected in a new firmware.

[akiralx]

Alex, the posterization (not banding) is probably due to overexposure. No change in bit depth will rescue the image.

 

If you clip a channel (and I'm thinking the blue channel here is well and truly clipped) then it's up to the RAW program how it deals with that. Some do well in some situations, and some don't.

 

So I'd say you have a LR problem with the clipping, not strictly speaking an M8 problem.

 

I don't suppose you want to post the RAW file so we can have a look? If you don't have your own server, you can use yousendit.com to let us download it.... Just send the file to yourself at YouSendIt - Send large files - transfer delivery - FTP Replacement then post the URL they send you here.

 

Jamie, it wasn't my image originally. I just chipped in later!

[Jamie Roberts]

Jamie, it wasn't my image originally. I just chipped in later!

 

You're right Alex--sorry about that! So maybe the OP will post a RAW and we can have a look....

[fishblimp]

here ya go:

YouSendIt - Send large files - transfer delivery - FTP Replacement

[jaapv]

I´ve rarely seen such a horrible file for mixed lighting - ACR sliders to the stops and still not balanced. Jamie is right, the blue channel is blown out completely. I´d give this one up as hopeless and console myself with the thought that it would have fared even worse on film....

[fishblimp]

Hah! I didn't say it was a GOOD photo. I had just noticed the area under the blue light and wondered if I had a version of the camera that might be prone to banding.

[jaapv]

Rest assured - banding looks different.

[Jamie Roberts]

Yeah, it's actually not banding. Here's the best I could do in C1 wbalancing the statue. Makes an ok bw and too...

 

The issue is how the RAW converter handles way out there WB and saturated colours. C1 does an easier job of this, I think, than LR.

 

BTW--what did you do to this DNG? C1 didn't recognise it as an M8 DNG, though the information is there in the EXIF...That means that I had to add the profile manually (very weird) and I couldn't use any optical tricks on the lens palette (a vignette would really help this shot).

 

Is LightRoom writing out to DNGs now?! Or did you run it through some DNG processor?

 

[ATTACH]122248[/ATTACH]

 

Note too it's not that far blown, as I thought initially, and that the funky shadow is actually a shadow--and not an artifact. The wall must be very uneven. The statue is actually underexposed a wee bit, except for the overhead, which evidently is causing LR some interpretation problems. Jaap is right too--that's some funky mixed light!

 

And here's the one-click black and white:

 

[ATTACH]122249[/ATTACH]

[Advertisement]

Hallo,

Look here: Leica M