Re: Realist lens:lines per millimeter

[P3D Greg Erker <erker@xxxxxxxxxxxxxx>]

> I read in the nice article in Stereo World on the Realist Custom a couple
>years ago. It was mentioned that the Realist 3.5 lens was rated at 120
>lines per millimeter. It seems to me that this number could be incorrect
>since even the very best Leica 35 mm. lenses are never more than 100 lines
>per millimeter. I talked to Ron Zakowski on the phone once and he told me
>that is what the specifications show. Maybe that number is correct but it
>sounds a bit inflated. Has anyone done any resolution chart measurements on
>this lens?
>                                                Dennis Selwa

  It could be confusion between l/mm and line pairs per mm.
A rating of 120 l/mm is equal to 60 lp/mm which sounds reasonable
to me. A really good lens at its best aperture might do 100 lp/mm
(which is 200 l/mm).

Greg E.



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