I myself prefer to have both options. However, they are some photographers for whom Black & White is the only option.
|Leica Monochrom M
Essentially, the Monochrom is virtually identical to the Leica M9 except for the obvious modifications. The sensor in question is the same KAF-18500 model originally produced by Kodak and the lack of colour filter array means that more available light will hit the sensor. As a result the base ISO sensitivity is increased from ISO 160 to ISO 320 and the maximum sensitivity also increasing from ISO 2500 to ISO 10,000. The reason for the increase at the high-sensitivity end is that colour image noise is non-existent. This allows recovery of more details from shadow areas and the luminance noise should look far more speckled and similar to film grain.
|Picture courtesy of Jack Au Sobol
The Leica Monochrom M is completely manual focus with manual shutter and aperture priority. It also has a 2.5inch, 230,000-pixel screen which means small screen and of low resolution which is NO LCD SCREEN.
They are a few other things to consider such as highlights blowing out more easily than cameras with colour filterarray over the sensor. This means that images needs to be underexposed for best results. On the other the only way to describe the quality of the images is STUNNING.
PS: The Leica Monochrom M is 35mm film camera