AllenF wrote in post #17234725
OK now apply that same method to the 7DmkII image and then look at and compare
ALL of the fabric samples with the 6D sample. Area for area. This will tell you if you tweeked the image to look the same in one place all the while it has messed up the rest of the image. If all the rest is fine then you have shown that the difference I have seen is mostly due to how the scene was exposed and PP can fix it. If on the other hand the image is right in one area and messed up in others then the fault is real and we must wait for more samples from IR of the production 7DmkII. Then we must compare those to the 6D and see how well it compares.
You were able to get them to PP well and I applaud your effort. This is what I was hoping to have happen.
Not just speculation but real work with visual results. Thank you again.
Sadly you have some more testing/comparing to do but I bet you can do it in 5 mins time.
I suspect it will not work on the rest of the image as I could not get it to work for me but I did not do an intense effort as it was quickly seen to not work for me. For example darkening the leaf pattern detail to make it show up better caused a loss of the light swirling detail in the black fabric pattern. Also look at the very light white fabric and see if the embossed leaf pattern is over accentuated or blown out. These two will establish the limits to white and black levels. It may be acceptable to give up one or the other,however the 7D does not need to make this compromising choice as it renders them all correctly with no visible loss.
Once again great job!
It's an interesting issue. As noted above, when I compared the IR red leafy cloth sample between the 6D and 7D2 with identical processing, I noticed that the 7D2 cloth looked worse in some areas, but was essentially identical to the 6D cloth in other areas, as shown by the sample I posted above (where the 7D2 is at least as good, if not better, than the 6D sample in terms of leaf detail). That, plus Gabe's series of samples above, convinces me that this is not a camera issue, it's an IR issue with their sample cloth and/or lighting.
My preliminary conclusions, after looking at various samples, including RAWs that I converted myself, are that:
1) The 7D2 has superior image quality to the 7D, although processing plays a big part in how much better, as demonstrated by Teamspeed (the 7D2 noise appears to be finer-grained and is probably more easily cleaned up than 7D noise);
2) The 7D2 has approximately equivalent high-ISO noise to the 1D4;
3) The 7D2 is very close to the 5D2 in high-ISO noise, probably less than half a stop behind if not even closer;
4) The 7D2 is about a stop behind the 5D3 in high-ISO noise (7D2 ISO6400 roughly comparable to 5D3 ISO12800).
Personally, I find this very impressive for a 1.6 crop sensor camera.