Archived posting to the Leica Users Group, 2001/03/12

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Subject: Re: [Leica] re-My 50 Summicron focuses past infinity
From: John Collier <>
Date: Mon, 12 Mar 2001 18:16:42 -0700

You will have to test to find out exactly what the problem is. The easiest
thing would be to go to your dealer and try your lenses and body against
theirs. I had a fifty that was the odd man out in my lens line up and I sent
it in for a CLA and a rangefinder cam adjustment. No problems since. If it
is only very slightly out I would test it out wide open at infinity and
closest focus, if everything is fine on film, you could wait until things
are due their regular CLA* to make adjustments. Remember infinity is far far
away. Test on a target at least 3.5 kilometres (2 miles) away and do not
test through glass.

John Collier

*You do regularly maintain your equipment I hope.

> From: Tristan Tom <Tristan@TristanTom.COM>
> So I just noticed that my 50 Summicron M focuses just slightly past
> infinity when I look through the viewfinder. I don't see any double
> imaging at distance objects while focused at infinity, however it's
> slightly blurry. If I back off from infinity just ever so slightly,
> then the object gets ever so slightly clearer. I tried the same test
> with my 35 and my 35 is right on at infinity. Is this normal or even
> something I should worry about for wide open portraits with the 50
> etc?