Nikon D40 with 18-55mm kit lens – sharpness test

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

200

ISO400 1/8 second at f6.3

400

ISO800 1/15 second f6.3

800

Judge the sharpness for yourself. Does the noise at the increased ISO degrade the image to the point that it starts to look mushy? Does the camera bring into play some kind of noise reduction that interferes with getting a sharp image? Personally I think the shots at all sensitivities are indistinguishable for all practical purposes.

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