The only thing is you'll want to get an IR-cut filter for it, to avoid weird color shifts (or b&w tone shifts) resulting from the lack of adequate IR filtration on the M8/8.2's sensor. The Summarit takes an E41 41mm filter. I'm not sure if Leica, B+W or Heliopan makes one. If they do, you're all set. If not then you could use a 41-43 or 41-46 step-up (which might preclude using the original shade) or 41-40.5 or 41-39 stepdown adaptor (doubt it would vignette because of the cropped image circle)...if any of those adaptors exist. It might also be possible to transfer the glass from a 40.5 B+W 486 into an old E41 Leica filter mount.