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luigi bertolotti · April 30th, 2008, 07:30 AM

Can you give some more detail on the lens and the camera you're trying to use ? From your post, I suppose is some Leitz lens mounted on a Leica Rangefinder body; usually, the silver button on the side unlocks the movement of the focus helicoid, that in 90 mm lenses usually has a range from 3 feet to infinity : looking into the Viewfinder/rangefinder you must match the double image at the center of the view: when they are coindident, the subject is in focus.
But I don't remember of a 90 mm Leitz lens that has the silver button... they are typical of shorter focals like 50-35... how is the engraving on the front ring of the lens you are speaking of ?

April 30th, 2008, 07:30 AM	#2 (permalink)
luigi bertolotti Erfahrener Benutzer Join Date: January 24th, 2007 Location: Brescia Posts: 2,425	Re: ernst leitz 90mm lens Can you give some more detail on the lens and the camera you're trying to use ? From your post, I suppose is some Leitz lens mounted on a Leica Rangefinder body; usually, the silver button on the side unlocks the movement of the focus helicoid, that in 90 mm lenses usually has a range from 3 feet to infinity : looking into the Viewfinder/rangefinder you must match the double image at the center of the view: when they are coindident, the subject is in focus. But I don't remember of a 90 mm Leitz lens that has the silver button... they are typical of shorter focals like 50-35... how is the engraving on the front ring of the lens you are speaking of ?