From reading all the posts and looking at the images, it seems to me that in using the 7D and other cropped cameras like it, that we have a fundamental Catch 22.
Due to its pixel density it is claimed that we need to use high shutter speeds.
This is difficult when there is good light but not very bright light, so to satisfy the above we need to raise the the ISO. The next problem is that we need to get close to the subject, to try to fill the frame to avoid cropping.The depth of field of cropped cameras in less than with full frame, so if we move closer to the subject, the effective depth of field decreases. To increase depth of field we need to use higher apertures, but to maintain shutter speed and exposure we have to increase the ISO. Very soon we are in ISO 3200 territory. We also know that the use of higher ISO damages the fine detail that we are trying to capture.
So Catch 22
Here is a small demo simulating ISO 3200.
I took a 5D2 file and added some noise simulated to match noise from a 7D at ISO 3200. I merged the noise and the original file and then used a pass of Neatimage 7 removing 75% of the added noise and sharpened to match the original file.
It is the reason why I never use the 7D at ISOs higher than 640
Of course the better thing to do is to take a series of pictures of an object with furry texture, perhaps a childs toy at increasing ISO from 100-6400 and then to inspect them.
Mike Engles
Wow!...Nothing more to say other than simply wow.
+1
There are so many wrong premises here that I wouldn\'t even know where to begin.
Did you know that, if I took a picture of George Bush\'s head and overlayed it onto a picture of Queen Elizabeth\'s body, Queen Elizabeth would look just like George Bush with an old lady\'s body.
Les
Sep 03, 2012 at 04:37 PM
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