On M8's manual, p.87
Quote: 'The nominal focal lengths of Leica M lenses are based on the 35mm-format, i.e. on a film format of 24x36mm. In comparison, with its 18x27mm, the sensor in the LEICA M8 is somewhat smaller though by a factor of 0.75. Therefore, when used on the LEICA M8, these lenses have angles of view corresponding to lenses with focal lengths that are longer by a factor of 1.33 (1.33 = reciprocal of 0.75). This
has the respective effects on their perspective, but not on their depth of field, which, with the LEICA M8, can also be read directly off the lens (see the lens instructions for more details).
The bright-line frame in the viewfinder of the LEICA M8 of course always shows the “correct” field of view for this camera, i.e. it takes account of the increased focal length. You can therefore compose your pictures
in the normal way, just as for other cameras in the Leica M series'.
End of quote.
As always, my suggestions for buying any camera, go download the manual, read through it.
Understand it, see whether you like it.
BTW, I have been recently reading Nikon's D3 manual. It 476 pages long to be exact (japanese version that is). Gosh, when is Nikon going to put out a full fram FM3a type digital version?
Simple, smaller, lighter, FX sensor . . . just give me M mode . . . .