Archived posting to the Leica Users Group, 2001/05/18

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Subject: Re: [Leica] Canon 1.5 Bokeh
From: "Stanislaw B.A. Stawowy" <watteau@krakow.neurosoft.net>
Date: Fri, 18 May 2001 11:39:01 +0200
References: <200105180235.TAA25031@mejac.palo-alto.ca.us>
 
> >Sorry, guys, the Canon 1.5 has exactly the same type of bokeh the 1.5
> >Sonnar and 1.5 Jupiter have (to say nothing of the 1.5 Nikkor).  Those
> >triangles in Kyle's picture are something else entirely.  Maybe flare.
> 
> 
> Maybe "coma."

it IS coma.

Look at those circles - have dark center and bright edges. 
As front element of Sonnars (and, AFAIK, Canon 1.5 is a 
stolen Zeiss Sonnar design) have strong curvature, they
exhibit strong coma. Circles: ( ) change into: /\ 
- -----                                
                                St.
Replies: Reply from "Dante A. Stella" <dante@umich.edu> (Re: [Leica] Canon 1.5 Bokeh)
Reply from Marc James Small <msmall@roanoke.infi.net> (Re: [Leica] Canon 1.5 Bokeh)
Reply from Mark Rabiner <mark@rabiner.cncoffice.com> (Re: [Leica] Canon 1.5 Bokeh)
 In reply to: Message from "Richard W. Hemingway" <rheming@attglobal.net> (Re: [Leica] Canon 1.5 Bokeh)