Photograph Works

Method

Camera propped on worktop (makes a great tripod)
White balance set to fluorescent
Camera on aperture priority
Shots taken in RAW
First shot at ISO200, second at ISO400, and the third at ISO800
Shots developed in Camera RAW4.1 in Bridge CS3
Sharpening sliders set at ‘Amount’ 100, ‘Radius’ 1, ‘Detail’ 50, and ‘Masking’ 0.

The details for the three shots, which are all shown at 100%, are:

ISO200, 1/5 second at f6.3

ISO400 1/8 second at f6.3

ISO800 1/15 second f6.3

Judge the sharpness for yourself. Personally I think they are indistinguishable for all practical purposes.