Leica User Forum - View Single Post - am i expecting to much (summicron 50 on mp set to infinity)?

rob_x2004 · 04/08/08, 05:17 AM

Its an interesting one. Comparing the first 50C image, and the last 50C, there appears a similar level of detail recorded, though on the last it is difficult to find something as small or fine as say the railings on the first. I looked at the shadow gap between the wire and the screw head where the wire is bent round to fix the grill.

I was also wondering if it is a matter of contrasts. The second image appears clearer, but it is all pretty much an even and lower light exposure. The first contains extremes in highlight and adjacent shadow and maybe something of the lenses writing qualities come in to play.

My feeling is that the lens is not quite on the money at infinity focus, but I wonder if that is rangefinder coupling accuracy and whether lenses at infinity stop are tuned just passed focus, or whether there is something in the lens optics that dictates best focus is in a zone where the lens is designed to be used, and to get that the thing becomes tuned away from perfection at infinity.

Hopefully there is someone who understands lens design here at forum.

04/08/08, 05:17 AM	#7 (permalink)
rob_x2004 Erfahrener Benutzer Join Date: 02/18/05 Posts: 3,730	Re: am i expecting to much (summicron 50 on mp set to infinity)? Its an interesting one. Comparing the first 50C image, and the last 50C, there appears a similar level of detail recorded, though on the last it is difficult to find something as small or fine as say the railings on the first. I looked at the shadow gap between the wire and the screw head where the wire is bent round to fix the grill. I was also wondering if it is a matter of contrasts. The second image appears clearer, but it is all pretty much an even and lower light exposure. The first contains extremes in highlight and adjacent shadow and maybe something of the lenses writing qualities come in to play. My feeling is that the lens is not quite on the money at infinity focus, but I wonder if that is rangefinder coupling accuracy and whether lenses at infinity stop are tuned just passed focus, or whether there is something in the lens optics that dictates best focus is in a zone where the lens is designed to be used, and to get that the thing becomes tuned away from perfection at infinity. Hopefully there is someone who understands lens design here at forum.