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Author Topic: Firmware update for 5D3 Problem? Black halos around stars in RAW  (Read 7812 times)

Bosman

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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #15 on: September 09, 2012, 12:23:09 PM »
Looks like blown highlights to me. The light on the shiny point of her lip and the sequin of her veil catching it in exactly the wrong position.
Well sure it got blown in those tiny spots but being outlined in black is an artifact, un-natural to what an eye would see.
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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #15 on: September 09, 2012, 12:23:09 PM »

Aglet

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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #16 on: September 09, 2012, 01:45:10 PM »
There is another thread from a person seeing white X's on a black background.  You might compare notes with the poster, however, he did not yet post a image.  It sounds like a similar issue.

that sounds a bit more like de-bayering working around a bad pixel

risc32

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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #17 on: September 09, 2012, 02:01:40 PM »
didn't that fuji 1x100 have this same problem, and a firmware tweak helped. Actually, the first thing i thought when i saw it was that someone had cranked the "velocity modulation scanning" . it's a hold over from when i did ISF calibrations on monitors. but it still makes me wonder if they are doing something like that in firmware with these images.

Bosman

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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #18 on: September 09, 2012, 02:10:53 PM »
Didn't the 7d also have this early on?
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Mt Spokane Photography

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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #19 on: September 09, 2012, 02:23:55 PM »
Didn't the 7d also have this early on?
The 5D MK II had issues with highlights, and was fixed in firmware.  However, users have tested their 5D MK III's for the issue and haven't found it, at least not in any high percentage of the cameras.
That said, individual cameras can have a issue and need to be adjusted or replaced, it can happen.  The original issue with the 5D MK II was nowhere as bad as the image with the spot on her lip, that is really bad.

nubu

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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #20 on: September 09, 2012, 02:24:49 PM »
For those starting this "black orb" discussion please post a raw pic  showing this somewhere. Then we can have a look at it. Posting oversharpened (e.g. default settings of unsharp masking in dpp is horrible!) jpgs does not help. I am still convinced that this is a postprocessing artfact of an highly overexposed pixel....
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epsiloneri

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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #21 on: September 09, 2012, 02:45:19 PM »
I agree with nubu. Looks like a postprocessing artefact (sharpening filter, NR).

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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #21 on: September 09, 2012, 02:45:19 PM »

Bosman

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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #22 on: September 09, 2012, 02:47:18 PM »
You don't need this full version, this isn't from processing. What you see with your eye is what is there, you won't find new data that will change the fact of the black haloed circles you see. Also to be clear this is unprocessed.
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epsiloneri

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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #23 on: September 09, 2012, 02:53:05 PM »
Anyone out there having the same problems while doing night sky?
Yes, I happened to take a night shot with stars using a 5D3 yesterday, and I see this precise phenomenom for saturated stars when the default sharpening is used (just tested). When I turn sharpening off, the black halos disappear. I just tried it but am to lazy to produce screenshots for you... just try it yourself. Using unsharp mask as a "sharpening" filter is particularly good at producing black halos.


Bosman

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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #24 on: September 09, 2012, 02:54:03 PM »
Ok, for you who can't believe. I cannot post a 7.3 mg file here and if i shrink it to do so won't there be another reason why this is a processing issue? Sorry, i am annoyed by the comments. When i say it hasn't been processed and what is going on with images then it is still suggested i am lying and that it in fact has been sharpened, it bugs me a little. Sorry, maybe i am in a bad mood about it now.
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epsiloneri

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Re: 5D3 Problem black halos around stars in RAW files...hmm
« Reply #25 on: September 09, 2012, 02:57:21 PM »
I can't say but what about the fact that your points of light are ovals?
Since your question hasn't been addressed yet... the 'ovals' are due to motion blur.

epsiloneri

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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #26 on: September 09, 2012, 03:03:33 PM »
When i say it hasn't been processed and what is going on with images then it is still suggested i am lying and that it in fact has been sharpened, it bugs me a little.
I was commenting on Pedro's image. In your case it looks like hot pixels with demosaicing artefacts. Are the bright spots in your picture visible at the same pixel positions in other pictures taken at the same time with similar settings? There's always processing going on in producing images, it doesn't need to be the post-processing that introduces problems.

wockawocka

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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #27 on: September 09, 2012, 03:14:35 PM »
Looks like blown highlights to me. The light on the shiny point of her lip and the sequin of her veil catching it in exactly the wrong position.
Well sure it got blown in those tiny spots but being outlined in black is an artifact, un-natural to what an eye would see.

Could you send me the RAW file if I sent you my details?
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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #27 on: September 09, 2012, 03:14:35 PM »

Bosman

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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #28 on: September 09, 2012, 03:24:09 PM »
Looks like blown highlights to me. The light on the shiny point of her lip and the sequin of her veil catching it in exactly the wrong position.
Well sure it got blown in those tiny spots but being outlined in black is an artifact, un-natural to what an eye would see.

Could you send me the RAW file if I sent you my details?
I could, just pm me. It is jpeg.
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Bosman

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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #29 on: September 09, 2012, 03:26:01 PM »
When i say it hasn't been processed and what is going on with images then it is still suggested i am lying and that it in fact has been sharpened, it bugs me a little.
I was commenting on Pedro's image. In your case it looks like hot pixels with demosaicing artefacts. Are the bright spots in your picture visible at the same pixel positions in other pictures taken at the same time with similar settings? There's always processing going on in producing images, it doesn't need to be the post-processing that introduces problems.
I am sorry, I apologize for being wrong about that. I didn't have any extra processes in camera, all that was off at the time. I have since allowed standard noise reduction in camera since it does so well. But yea I figure a firmware fix would be in order, but i don't know.
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Re: Firmware update for 5D3 Problem? Black halos around stars in RAW
« Reply #29 on: September 09, 2012, 03:26:01 PM »