Archived posting to the Leica Users Group, 1997/05/20

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Subject: Re: 35mm lenses compared?(tech/optics)
From: "O.J. Anshus" <otto@cs.uit.no>
Date: Tue, 20 May 1997 09:29:40 +0200

> From: Erwin Puts <imxputs@knoware.nl>
> Date: Mon, 19 May 97 19:22:44 +0100
> Subject: Re: 35mm lenses compared?(tech/optics)
> 
<snip>
>
> Are the light sources sharply in focus? What you describe seems to me the effect of halo > around light sources. And that is quite normal. 

The light sources are indeed in focus. And there is no halo around the
light sources.

> The film you used is also a factor of influence. 

Perhaps the film can be ruled out since the ASPH did not show coma using
the same film? 

>'Coma" you can recognize as distinct and
> asymmetrical triangles of light, like the tail of a comet. Mostly the
> light patch fades away in one direction. 

This is a very good description of what I am seeing.

>
<snip>
>
> Erwin Puts

Otto