Upgrade from Rebel to 1DS - Noise?

[Hannah]

Never used a Pro Model before but my recently purchased 1Ds shows a uniform perfected distributed noise on my both of my lens that I do not see when using with the Rebel? Comes through in the shots too.

I was wondering if it is a product of the enhanced sensor or do I have a dud here? I can't imagine is could be a dirty sensor as uniform as it is but maybe? It seems to get slightly more of a deeper gradient like look around the outer edges. A dark uniform grain thing.

Little worried,

Hannah

[CyberDyneSystems]

What ISO are you set to?

The 1Ds does not handle higher ISO settings as well as the Rebel does.. at lower settings this should not be evident.. but I belive as low as 400ISO you will start to see the difference.

[clicky]

An image-example would be nice. As CDS says the Rebel has an advantage at high ISO compared to the 1Ds Mark I. Double check the ISO, exposure-compensation, and JPEG/RAW quality-settings. The previous owner might also tampered with the C.fn/customfunction (either contrast/saturation could be way high?), you might want to reset the to factory-settings?