Canon 5D Mark II

Shutter 30s - 1/8000 s Max Resolution 5616 x 3744 (21M px)
Dimensions 152 x 114 x 75 mm (6 x 4.5 x 3 in.) Other Resolutions 4080 x 2720, 2784 x 1856, 5616 x 3744, 3861 x 2574, 2784 x 1856
Weight 850 g (30 oz) Sensor Size, Pixel Density 36 x 24 mm, 2.4 Mpx/cm2

Comparison of image quality at different camera settings is given below (ISO 50 used). The images were recorded simultaneously at RAW and at JPG (faithful) settings.

lens quality test

The most unexpected is loss of resolution in JPG Large format, compared to RAW Large format. More on this phenomenon can be found elsewhere. The other, smaller formats show the same resolution for JPG and RAW, although the contrast is worse in JPG format.

The resolution reading is almost independent on the ISO-settings in the "L" mode (21M pixel), as shown below. The 4 colorful circles are 3x enlarged. The image quality is acceptable up to ISO 6400, and above that even the resolution deteriorates due to noise, see below.
ISO dependence

Canon 5D Mark II has 6 default styles in JPG format. They are Standard, Portrait, Landscape, Neutral, Faithful, and Monochrome. All differ by a degree of sharpening, contrast, color saturation and tone, as shown below (made at ISO 50).
styles
It is apparent that the RAW image looks the best, mostly due to a better sharpness, but if you have a limited memory space or no time to work with RAW files, the Landscape mode looks very attractive. The picture styles are customizable, so there is more to play with. Note that the styles apply only for the JPG modes, not RAW.

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