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ISO-Values of a Canon 7D from 100 to 12800

A comparison of the automatic lighting optimization (ALC) and the highlight tone priority (HTP) and their impact on the iso noise.

For this test scenario I chose some motive with lots of rather homogenous dark surfaces because those are most likely to expose the noise. 

There is one picture for each ISO level that corresponds to full E.V. levels, such as 100, 200, 400 and so on.

When HTP (D+) is enabled then the available ISO values range from 200 to 6400 (no 100, no H = 12800). With HTP enabled ALC is always off.

Gegenüberstellung 100, 400, 3200 und 12800 ASA

The individual images in full resolution (OOC): 

ISO ohne Belichtungsopt. mit Belichtungsopt. Tonwertpriorität
100  
200
400
800
1600
3200
6400
12800