I have no idea what you mean. Mine focuses like every other Leica rangerfinder ever made... you turn the lens to align the two images.
Oh sorry F--- What I enquired was, in 1960 I worked for commercial Photo company in the UK--we basically travelled the Northern areas covering Clubs/ Promenades/Holiday camps /etc
We were called "Smudgers " our cameras were Leica M2 bodies single strokers with the Summaron 28 or 35mm WA lenses--( sorry bit hazy cannot recall exactly which Focal length) they were fixed focus and preset aperture
same for ASA-by the company they were given to us this way --sort of Preset/snap ready.
the Lens focus was always set on midway between Infinity and F11 for max depth of field- sometimes we had to snap in Clubs pitch black no way for focus just point and Flash --ha!.
My apologies guess I was mistaken into believing the M2 did not Focus in the viewfinder with those lenses as the couple of occasions
I "fiddled" with the settings I cannot recall any Focus framing ,coming together of the images, when the lens was focused manually.
Sorry for the confusion I must have been mistaken--enjoy the brand they are superb--Good Shooting
!
BruceD