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We had a fantastic looking moon. It was visible through very thin clouds, creating a magnificent halo. Capturing the halo colors did not really work out :(
-- How to take a moon picture:
Taking pictures of moon in the Canon DSLR Flickr group
How to take a picture of the moon on Stop Shooting Auto!
This illustrates the effects of noise at higher ISOs.
The top three images are enlarged crops from a photo of a box I happened to have laying around. At ISO 100, the image is more or less smooth. At ISO 400, you start to see some color noise, and at ISO 1600 the color noise is highly visible.
The bottom image is a real-world illustration of what noise can do to a photo. This was taken during a concert under challenging lighting conditions, and noise is painfully visible in her skin.
All images were shot with a Canon Digital Rebel XT.
This is my submission for a homework assignment on the Stop Shooting Auto! blog. I shot it in manual mode with an aperture setting of 3.5 (largest for this lens) and a 1/10 sec exposure. Since it was indoors I bumped the ISO to 400.