srtiwari
Daktari
Just picked up a new Sony a6000 at B&H this past weekend, and shot a few frames back here in Florida today.
The RAW files have this strange bright banding on most, but not all images. The JPEGs of the same are just fine.
Anyone know what causes this ? Is this a fixable issue, or should I just return the camera ?
Thanks for any advice...
The RAW files have this strange bright banding on most, but not all images. The JPEGs of the same are just fine.
Anyone know what causes this ? Is this a fixable issue, or should I just return the camera ?
Thanks for any advice...
Attachments
YYV_146
Well-known
If the jpegs are fine, the camera should be okay. Have you tried opening the files with another software?
ColSebastianMoran
( IRL Richard Karash )
I'm with Victor. Try opening the RAWs with another program.
Never seen anything like this.
If it's new from the store, sounds like you are covered.
Never seen anything like this.
If it's new from the store, sounds like you are covered.
Bille
Well-known
Anyone know what causes this ?
Upload the raw file and we will see.
srtiwari
Daktari
Yes the JPGs are fine.
Yes, I opened the files with Iridient, and they show the same banding.
However, when I look at the file directly on the SD card itself when mounted on my Desktop (Mac), it does not show the banding ! It only does that when in Lightroom or Iridient .
Here are links from my DropBox which will allow downloading the RAW files.
https://www.dropbox.com/s/w0napr18ocxk2j9/DSC00009.ARW?dl=0
https://www.dropbox.com/s/8y8qku2kyx4uvh3/DSC00011.ARW?dl=0
Yes, I opened the files with Iridient, and they show the same banding.
However, when I look at the file directly on the SD card itself when mounted on my Desktop (Mac), it does not show the banding ! It only does that when in Lightroom or Iridient .
Here are links from my DropBox which will allow downloading the RAW files.
https://www.dropbox.com/s/w0napr18ocxk2j9/DSC00009.ARW?dl=0
https://www.dropbox.com/s/8y8qku2kyx4uvh3/DSC00011.ARW?dl=0
pvdhaar
Peter
Yes the JPGs are fine.
Yes, I opened the files with Iridient, and they show the same banding.
However, when I look at the file directly on the SD card itself when mounted on my Desktop (Mac), it does not show the banding ! It only does that when in Lightroom or Iridient .
Here are links from my DropBox which will allow downloading the RAW files.
https://www.dropbox.com/s/w0napr18ocxk2j9/DSC00009.ARW?dl=0
https://www.dropbox.com/s/8y8qku2kyx4uvh3/DSC00011.ARW?dl=0
I just loaded the first one in Sony's own 'Image Data Converter'.. There are absolutely no artifacts. Converted it to jpg, and that's also fine..
pvdhaar
Peter
Also loaded and converted the second image.. Same story: no artifacts.I just loaded the first one in Sony's own 'Image Data Converter'.. There are absolutely no artifacts. Converted it to jpg, and that's also fine..
On a side note though.. You're shooting a combination of high iso (3200 for the chair, 1250 for the house) and underexposure (-1EV). Sony has a tendency to already marginally expose to avoid blowing out highlights. My experience is that running them at +1/3 to +2/3 EV at higher ISO gives files that give more data/depth to work with in post processing.
Attachments
YYV_146
Well-known
Yes the JPGs are fine.
Yes, I opened the files with Iridient, and they show the same banding.
However, when I look at the file directly on the SD card itself when mounted on my Desktop (Mac), it does not show the banding ! It only does that when in Lightroom or Iridient .
Here are links from my DropBox which will allow downloading the RAW files.
https://www.dropbox.com/s/w0napr18ocxk2j9/DSC00009.ARW?dl=0
https://www.dropbox.com/s/8y8qku2kyx4uvh3/DSC00011.ARW?dl=0
checked with CC and latest version of ACR. All good.
kxl
Social Documentary
I've heard about this before (in fact, here's the thread) and I don't think anyone has really come up with a root cause, although conjecture includes hardware issues during file transfer or the way Lightroom compresses RAW files or ???.
Only consensus seems to be: it's not the camera.
Only consensus seems to be: it's not the camera.
tbhv55
Well-known
I have just tried with Rawtherapee, and with Faststone Image Viewer, and no sign of the problem.
I also tried it in Sony IDC (as did pvdhaar), and no problem there either.
I also tried it in Sony IDC (as did pvdhaar), and no problem there either.
srtiwari
Daktari
Thank you all for the feedback !
Further..
I put the same SD card, with the original images still on it, into a different reader, and reimported them into Lightroom, and also Iridient, and they were just fine.
It would seem to point to the SD card reader as the culprit.
The files were not damaged/corrupted.
Further..
I put the same SD card, with the original images still on it, into a different reader, and reimported them into Lightroom, and also Iridient, and they were just fine.
It would seem to point to the SD card reader as the culprit.
The files were not damaged/corrupted.
srtiwari
Daktari
Also loaded and converted the second image.. Same story: no artifacts.
On a side note though.. You're shooting a combination of high iso (3200 for the chair, 1250 for the house) and underexposure (-1EV). Sony has a tendency to already marginally expose to avoid blowing out highlights. My experience is that running them at +1/3 to +2/3 EV at higher ISO gives files that give more data/depth to work with in post processing.
Thanks for the side note Peter.
I am forced to use high ISO in low light, and use -.7 to -2.0 to generate an image that duplicates the low light, rather than it showing up as bright daylight. Is there a better way to do this ?
Subhash
pvdhaar
Peter
There is.. In short: don't underexpose during capture. Dial down the brightness only afterwards in post processing to make the image resemble the scene you saw.Thanks for the side note Peter.
I am forced to use high ISO in low light, and use -.7 to -2.0 to generate an image that duplicates the low light, rather than it showing up as bright daylight. Is there a better way to do this ?
Subhash
This way you retain much more shadow detail. What you're now doing is the opposite.. the exposure is so thin, that you have no good differentiation between light levels in the shadows, and these now come out mushy and can't be recovered. Moreover, there are no highlights to preserve, so there's no need to underexpose.
Instead of not underexposing at all, you can even go a bit further and overexpose if the highlights don't get blown out. This method is called 'expose to the right' and explained extensively on the web (e.g. Google on ETTR)..
If you really need to create the image in camera, there's a free app that you can install on the a6000 (Photo Retouch) that allows you to change the brightness and contrast of a jpeg image that you've captured. You'll get better results shooting jpeg with the ETTR method and dialing down brightness than with underexposed high ISO RAW and trying to recover detail that isn't there..
srtiwari
Daktari
There is.. In short: don't underexpose during capture. Dial down the brightness only afterwards in post processing to make the image resemble the scene you saw.
This way you retain much more shadow detail. What you're now doing is the opposite.. the exposure is so thin, that you have no good differentiation between light levels in the shadows, and these now come out mushy and can't be recovered. Moreover, there are no highlights to preserve, so there's no need to underexpose.
Instead of not underexposing at all, you can even go a bit further and overexpose if the highlights don't get blown out. This method is called 'expose to the right' and explained extensively on the web (e.g. Google on ETTR)..
If you really need to create the image in camera, there's a free app that you can install on the a6000 (Photo Retouch) that allows you to change the brightness and contrast of a jpeg image that you've captured. You'll get better results shooting jpeg with the ETTR method and dialing down brightness than with underexposed high ISO RAW and trying to recover detail that isn't there..
Thank you for that. I'm going to try it.
-Subhash
srtiwari
Daktari
Oh, Oh ! Problem NOT solved.
I had thought it was the Card reader, but now another Card reader (which I have used in the past without problems) has the same issue. And yet, the desktop view of the contents of the card look just fine !
Could someone using Lightroom please try this file and see if it has the same problem ? That would implicate the software's RAW conversion...
https://www.dropbox.com/s/w0napr18oc...00009.ARW?dl=0
I had thought it was the Card reader, but now another Card reader (which I have used in the past without problems) has the same issue. And yet, the desktop view of the contents of the card look just fine !
Could someone using Lightroom please try this file and see if it has the same problem ? That would implicate the software's RAW conversion...
https://www.dropbox.com/s/w0napr18oc...00009.ARW?dl=0
ColSebastianMoran
( IRL Richard Karash )
I, too, opened the first raw file with no problem (Lightroom and Apple Preview, both on Mac). Tried, but cannot download the file linked in #15 (gives 404 error, not found). So, back to the first files:
It's not the file, and therefore not the camera.
It's not the file, so whatever you used to get the file onto Dropbox is also OK.
That leaves your computer, or more specifically, your computer while running software. Test memory? Reinstall software? This is a thorny one. Please let us know what happens!
It's not the file, and therefore not the camera.
It's not the file, so whatever you used to get the file onto Dropbox is also OK.
That leaves your computer, or more specifically, your computer while running software. Test memory? Reinstall software? This is a thorny one. Please let us know what happens!
srtiwari
Daktari
Further...
1. It only occurs in Lightroom, although I thought I saw it once in Iridient. Never happened again !
2. Reimporting into Lightroom sometimes does not replicate the problem.
2. Happens with, both, Fuji and Sony RAW files.
3. The Bands are always parallel to the longer side - upright in Portrait mode and horizontal in Landscape, and only cover about half the image.
4. It is inconsistent- sometimes 2 RAW images can be side by side, but only one shows the banding.
It looks like it may be something Lightroom does to the files at the time of importing. Actually, I can see the banding on the thumbnails window in Lightroom just after importing. Since I don't change anything from defaults, I have no idea what causes this !?
1. It only occurs in Lightroom, although I thought I saw it once in Iridient. Never happened again !
2. Reimporting into Lightroom sometimes does not replicate the problem.
2. Happens with, both, Fuji and Sony RAW files.
3. The Bands are always parallel to the longer side - upright in Portrait mode and horizontal in Landscape, and only cover about half the image.
4. It is inconsistent- sometimes 2 RAW images can be side by side, but only one shows the banding.
It looks like it may be something Lightroom does to the files at the time of importing. Actually, I can see the banding on the thumbnails window in Lightroom just after importing. Since I don't change anything from defaults, I have no idea what causes this !?
pvdhaar
Peter
If reading the images from the card sometimes fails and sometimes not, then the card is (intermittently) failing. Best to throw it away, and get a new one; this one is near end of life.Oh, Oh ! Problem NOT solved.
I had thought it was the Card reader, but now another Card reader (which I have used in the past without problems) has the same issue.
Intermittent reader failure of flash cards indicates that the flash memory cells are only written marginally, so that read-out success depends on temperature and supply voltage drop..
ColSebastianMoran
( IRL Richard Karash )
I highly doubt a Lightroom bug. It might be a bad installation, but I'm betting it's interaction with other software or a hardware problem.
I suggest:
- Reinstall Lightroom
- Have your computer checked out
I suggest:
- Reinstall Lightroom
- Have your computer checked out
Share:
-
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.