Thanks for the mini-review. Took the ZD back to Oklahoma for the weekend. Took this shot in Witicha Falls TX in a 50s era hamburger joint. I tried to upload the raw but it ws too big. Here is the jpg for study of noise, etc. Taken with the 35mm handheld.
Response: ISO 100, F3.5, 1/80.
This back is two months old (from B&H, one of the first ones off the shelf).
To be honest, it is hard for me to see the blobs since they may be just
color cast from the bottom of the chairs. I have examined the detail in ACR (the processor for this image, cnr 25) and I do see noise. Prior to the ZD I had a Kodak back and expected some noise.
If anyone knows of a revealing blob test, it would be nice to know.
Just for "fun", I am adding the Magenta Channel only version of this photo, I would expect blobs to stand out from mormal "random variable" noise.
Not sure I see it?