|ISO 100, 1/4 sec.|
This is clearly very blurred as I cannot handhold at 1/4 sec.
|ISO 400, 1/13 sec.|
This is much sharper and shows no noticeable noise.
|ISO 800, 1/30 sec.|
This is beginning to show noise at 100%, although it is still usable.
|ISO 1600, 1/60 sec|
This shows marked noise at 100%, although would be usable at lower magnifications and small print sizes.
|ISO 3200, 1/125 sec|
Marked noise in all parts of the photo, useful as a record only, or when lighting conditions are so poor that there is no alternative.
|ISO 64000, 1/200|
Here the camera automatically switched from RAW (which I had been previously using ) to taking in jpeg, and also decreased the pixel size, changing from approx. 12 x 9 inches to approx.7 x 5 inches. The effect is that the image shows less noise than the previous image at a lower ISO.
|ISO 12800, 1/400 sec.|
Noise is starting to return significantly, and the colour is rather odd!
These images were taken on a small camera (Lumix Lx5), with a correspondingly small sensor. I was surprised how high I could push the ISO rating and still get a usable image, although probably not printable at any large size. This could be very useful in situations where I could not use a flash or tripod, but still needed an accurate record, the noise could also be digitally reduced, or might become an interesting part of the image in itself.