LOOK MA, THEY'RE GONE! (How to Eliminate Black Dots)

Started Dec 8, 2008 | Discussions
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f_stops Contributing Member • Posts: 565
LOOK MA, THEY'RE GONE! (How to Eliminate Black Dots)

Just picked up my 5dII, and sure enough, I see black dots out of the box.

At iso 400 and iso 6400, with a 50/1.8 and 85/1.2L II. I took a few dozen shots, and they are easily duplicated.

I then turned the settings to "Disable" for highlight tone priority, lighting optimizer and noise reduction.

No black dots.

I have only had the camera for an hour, but hopefully this solves the problem. Any other 5dII owners - please give it a try.

200%
Default settings top iso 6400/400
optimizer/noise reduction disabled iso 6400/400
dng> CS3

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RichW Forum Pro • Posts: 12,759
Great job, now which one causes the problem?....

It can't be all three can it be??

Rich

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LeviBuzolic Junior Member • Posts: 41
Re: LOOK MA, THEY'RE GONE! (How to Eliminate Black Dots)

Nice work, I had a feeling the fix would be pretty simple, everybody just got a little to excited about the whole thing.

grammieb14 Senior Member • Posts: 2,440
Re: Great job, now which one causes the problem?....

Try turning them on one at a time & see what happens when taking a photo of lights. Sort of like feeding a baby one new food at a time to see if one causes allergies.
--
One day I'll learn how to post photos. I am 61 & technically challenged.

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fredlord Senior Member • Posts: 2,625
Re: LOOK MA, THEY'RE GONE! (How to Eliminate Black Dots)

You're a hero, dude. Good work!

I guess we'll try all the fixes until it's isolated.

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TenSafeFrogs Junior Member • Posts: 29
Re: Great job, now which one causes the problem?....

yeah, do you have to turn off all 3? could you re-enable each of those selectively and figure out what the exact cause is?

GeorgeML Contributing Member • Posts: 574
Re: LOOK MA, THEY'RE GONE! (How to Eliminate Black Dots)

fredlord wrote:

You're a hero, dude. Good work!

+1.
LOL.

uphillslide Regular Member • Posts: 351
Re: LOOK MA, THEY'RE GONE!

Nice work. Wow

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submagination Senior Member • Posts: 1,078
So the remaining question is...

If it can be tracked down to a single feature (or even the interaction between a few), can/will Canon identify the conflicting software logic and release a fix in a future firmware update?

Here's hoping.
--

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slerman Regular Member • Posts: 182
Re: LOOK MA, THEY'RE GONE! (How to Eliminate Black Dots)

I shot ISO 2000 images at around f5.6 at 1/125th in Times Square on Friday night and had no black spots or other odd artifacts. Highlight tone priority, lighting optimizer, and noise reduction were all off.

stuart melnikoff Regular Member • Posts: 270
Re: LOOK MA, THEY'RE GONE! (How to Eliminate Black Dots)

Great job tracking down the problem.

slerman wrote:

I shot ISO 2000 images at around f5.6 at 1/125th in Times Square on
Friday night and had no black spots or other odd artifacts. Highlight
tone priority, lighting optimizer, and noise reduction were all off.
--

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Oak and Acorn Veteran Member • Posts: 6,124
It's a really darn shame

that it took so much detail robbing noise removal to accomplish however.

f_stops wrote:

Just picked up my 5dII, and sure enough, I see black dots out of the
box.

At iso 400 and iso 6400, with a 50/1.8 and 85/1.2L II. I took a few
dozen shots, and they are easily duplicated.

I then turned the settings to "Disable" for highlight tone priority,
lighting optimizer and noise reduction.

No black dots.

I have only had the camera for an hour, but hopefully this solves the
problem. Any other 5dII owners - please give it a try.

200%
Default settings top iso 6400/400
optimizer/noise reduction disabled iso 6400/400
dng> CS3

Michael Mohrmann Senior Member • Posts: 2,117
Re: Great job, now which one causes the problem?....

grammieb14 wrote:

Try turning them on one at a time & see what happens when taking a
photo of lights. Sort of like feeding a baby one new food at a time
to see if one causes allergies.

That may isolate it, or it may be that a combination of settings is needed to produce the problem. Given the available options for each of the three functions (highlight tone priority, lighting optimizer, noise reduction), it may take several tests to actually track down the combination(s) that cause the problem.

Steve Galle Regular Member • Posts: 101
Re: LOOK MA, THEY'RE GONE! (How to Eliminate Black Dots)

This is fantastic; if it's an interaction between these features it will be possible to fix in firmware. Or, just avoid. I've had no black dots so far, I'll turn on the apropriate features and see if I can reproduce them.

I'd love to see the looks on the faces of anyone who canceled orders over this... DOH!

Thanks for digging into the problem.

-- hide signature --

Steve

Rick Knepper Forum Pro • Posts: 13,160
Thanks, I never intended to use any of that stuff anyway. nt
n/t
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Oak and Acorn Veteran Member • Posts: 6,124
Ah, I see what you did now - excellent find on the fix!

Sorry, missed the difference in the two sets of shots. Awesome discovery on the fix.

Kagetsu Regular Member • Posts: 250
Unlikely to be Noise reduction, most likely Highlight priority, or Optimiser. NT

None of that text here.

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commangor Regular Member • Posts: 314
Re: Unlikely to be Noise reduction, most likely Highlight priority, or Optimiser. NT

Glad to hear this news, almost collected my 5d2 last week but have to say sorry to the dealer because of this issue, looks like the fix is coming very soon..

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Rcihardc Contributing Member • Posts: 873
something is wrong

how come one of the images looks so processed? plus NR and ALO have no effect on RAW you can disable them in DPP, the black dots are in RAW data

f_stops wrote:

Just picked up my 5dII, and sure enough, I see black dots out of the
box.

At iso 400 and iso 6400, with a 50/1.8 and 85/1.2L II. I took a few
dozen shots, and they are easily duplicated.

I then turned the settings to "Disable" for highlight tone priority,
lighting optimizer and noise reduction.

No black dots.

I have only had the camera for an hour, but hopefully this solves the
problem. Any other 5dII owners - please give it a try.

200%
Default settings top iso 6400/400
optimizer/noise reduction disabled iso 6400/400
dng> CS3

-- hide signature --

Richard, NC
Never comment on something you don't know about

Fovea Contributing Member • Posts: 750
We need some other testers...

Great job. How come nobody else found the workaround though?

I guess it's because most of us worried posters don't own the camera yet

So please lucky owners, post some confirmations!

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