Archived posting to the Leica Users Group, 1999/02/15

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: Re: [Leica] 1,4/80 and 1,4/75
From: Francesco <fls@san.rr.com>
Date: Mon, 15 Feb 1999 21:28:26 -0800

Do you have a written report on the 80 Summilux, Erwin?

Francesco


At 06:52 AM 2/15/99 , imxputs wrote:
>These lenses have a slightly different performance. They are from the same 
>optical family tree that encompasses the 1,4/50 Summilux-M, 1,0/50
Noctilux-M,

>1,4/75 Summilux-M and 1,4/80 Summilux-R. The 1,4/75 and 1.4/80 are NOT 
>identical in their optical formula. The assertion that they are identical 
>(some earlier post on the LUG) is not true, but may be inspired by the fact 
>that the 2,8/90 M and R versions share the same optical system. The
2,8/135 M 
>and R versions also are identical in their optical parts.
>My observation that the 1,4/75 at full aperture has a better performance
than 
>the 1,4/80 is valid and is supported by the fact that the lens
prescription is

>different. The family resemblance can be seen in the fact that all four 
>members exhibit low to medium-high contrast at full aperture. More recent 
>Leica lenses in the 1,4 and 2,0 classes show much higher contrast at the
full 
>aperture setting. Ten years ago I would have given these lenses higher marks 
>than today. Since the 1,4 and 2,0 ASPH family we are in a different game as 
>far as full aperture performance is concerned.
>
>
>Erwin    
>