What a bunch of crap responses in this thread. If this were your camera you'd be anxious too, especially after the 1D3 problems. Really, if you can't contribute anything useful why just not refrain from reacting. This forum really is going down the drain.
To the OP: I don't have a 5D2 yet but will follow the issue. Thanks for bringing it up.
JFB318 wrote:
It appears, from other forums I have read, that several folks have found this same problem with their 1DSmkIII as well
I discovered this completely accidentally this morning, but this is actually visible in the 1Ds MkIII sample images. If you download the village scene, there are some blown highlights about a quarter in from the bottom that exhibit the same problem.
At 1/200 and ISO 100, it shouldn't be a dark frame subtraction artifact, either.
On the other hand, at one pixel wide, it's not going to have any considerable impact on print or typical screen viewing.
colinm wrote:
I discovered this completely accidentally this morning, but this is actually visible in the 1Ds MkIII sample images. If you download the village scene, there are some blown highlights about a quarter in from the bottom that exhibit the same problem.
At 1/200 and ISO 100, it shouldn't be a dark frame subtraction artifact, either.
On the other hand, at one pixel wide, it's not going to have any considerable impact on print or typical screen viewing.
I see what you mean, but is so minor that I would not even bother with it.
The thing that worries me is that it could be related to the changes they did to the gain amplifier to squeeze lower noise from the 5dmk2.
I really hope that canon will decide to fix it soon their reputation will go down the drain if not.
I started this thread in the interest of having an intelligent discussion on what I felt was a legitimate issue with the 5D Mark II. Nobody has an explanation why these black dots are there, or why they only appear exactly on the right side of blown highlights. But based on these kinds of replies, I can see this thread devolving into something quite nasty. I'm sorry I ever brought it up.
As a resident of the SF area, the light pattern on these building is caused by how the lights are installed on the buildings. This isn't the best image to see the effect, but even in the best images, the pattern of these lights will come through and cause a pattern. If I am passing anywhere near Treasure Island, I take a minute and shoot the shot on my 5DII in a way that shows how the lights are setup.
So, this is apprently a spill over of photons from the capture diode... Which is interesting really... I can't see why it couldn't be 'repaired' in firmware or Raw processing, pending data from the raw file capture.
I saw your 1D2 problem a while back Ivan, but I don't think they're quite the same. Where these black dots are appearing in highlighted regions, your blackened area's appear to be complete shadows. I certainly don't know what it is, but it doesn't bode well if it's a documented problem and hasn't had any kind of resolution since.
Kagetsu wrote:
I saw your 1D2 problem a while back Ivan, but I don't think they're quite the same. Where these black dots are appearing in highlighted regions, your blackened area's appear to be complete shadows. I certainly don't know what it is, but it doesn't bode well if it's a documented problem and hasn't had any kind of resolution since.
I agree, the 5D2 problem might not be the same as the 1D2N. Only Canon engineers would know for sure though. Just hope they can find a fix for the both of them.
Is there more samples from 5D2 with this problem that can be posted here for us to have a better look?
I have checked quite a few 1DS3 images and I can see no evidence of this on my camera. I will try to find the time to post samples, but it is not there...
It appears in RAW files, even at low ISO, and even with Lighting Optimizer, Long exposure noise reduction, High ISO speed noise reduction, and Highlight tone priority all disabled. It isn't a huge issue for my type of shooting, but a fix would be nice and I would be surprised if something isn't in the works to address this. I am confident that Canon will do the right thing on this. Eventually.
These JPGs are from a RAW shot at ISO 400, 1/30 at 8.0 with the 24-105 L:
( First one just for reference as to the enlarged area)
Not good for christmas lights. Canon forgot the "Christmas tree mode" on the the 5dII.
the iso50 is not bad (just a few dots) but the iso200 is very noticeable. 100% crop. 85L/1.2
I remembered this 1D2N thread and was going to post it here, but looking closely at these 1D2N shadows I came to the conclusion that this must be some different phenomena. In these 1DMarkII images:
1. Some of the "shadows" are completely separated from the light source.
2. These shadows have the same shape as the light source
3. These shadows occur above the image - not to the right
kevin2i wrote:
Not good for christmas lights. Canon forgot the "Christmas tree mode" on the the 5dII.
the iso50 is not bad (just a few dots) but the iso200 is very noticeable. 100% crop. 85L/1.2
Do you have any normal shots, something that you would actually want to print, that shows this problem?
GeneO wrote:
I remembered this 1D2N thread and was going to post it here, but looking closely at these 1D2N shadows I came to the conclusion that this must be some different phenomena. In these 1DMarkII images:
1. Some of the "shadows" are completely separated from the light source.
2. These shadows have the same shape as the light source
3. These shadows occur above the image - not to the right
- Gene
They are above the image because the shots are portrait, I think they are actually to the right when the camera is landscape as per the 5D MK II shots?
Mike V wrote:
They are above the image because the shots are portrait, I think they are actually to the right when the camera is landscape as per the 5D MK II shots?
Ah, duh. well take away one of my points (with a 50% probability they are to the left ?)
