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Re: [OM] 6 element 85mm f/2.8 [was: 100/2 zuiko]

Subject: Re: [OM] 6 element 85mm f/2.8 [was: 100/2 zuiko]
From: "Paul Farrar" <farrar@xxxxxxxxxxxx>
Date: Fri, 29 Jan 1999 14:47:35 -0600 (CST)
> 
> Alex writes:
> 
> > Also, I thought both OM designs
> >  were more "Sonnar" like (Zeiss 85F2.8/Canon 85F1.8FD) than gaussian(Canon
> >  85F1.8SSC)?
> 
> You got me there.  My Canon reference library doesn't have any books with
> optical designs.  In fact, I can't find good enough matches to any named type
> of design or lens in the Nikon and Minolta lines.  So, I guess it proves that
> either 85mm Zuiko was radical, eh?
> 
> "Gaussian."  I must have been off my rocker!  That is a symmetrical design.
> 
> Gary Reese
> Las Vegas, NV
> 

The 100/2 is a modified Gauss. The 5-element 85 is a Sonnar type.
Sonnar is a triplet with the forward + replaced by the front half from
a Gauss.

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