[HUG ] SV: Re: SWC or 40mm?

I would say, generally, that the difference between SWC and the 40 mm - 
regardless of type, is the distortion.  The 40 mm distorts more than the 
Biogon, - which hardly distorts at all.  If you want a lens that draws 
absolutely streight lines, - like photographing architecture, there is no way 
around the SWC.  

Tom of Oslo
 

> From: Karl Wolz [wolzphoto@xxxxxxxxxxxxxxxx]
> Sent: 2009-01-02 23:59:43 CET
> To: hasselblad@xxxxxxxxxxxxx
> Subject: [HUG ] Re: SWC or 40mm?
> 
> QG,
> 
> Thank you for a reasonable answer to the question.
> 
> Karl Wolz
> 
> -----Original Message-----
> From: hasselblad-bounce@xxxxxxxxxxxxx
> [mailto:hasselblad-bounce@xxxxxxxxxxxxx] On Behalf Of Q.G. de Bakker
> Sent: Friday, January 02, 2009 2:14 PM
> To: hasselblad@xxxxxxxxxxxxx
> Subject: [HUG ] Re: SWC or 40mm?
> 
> Michiel Fokkema wrote:
> 
> > Are they optically very different?
> 
> They are different, yes.
> 
> The old, C version is a good lens.
> The CF version has slightly beter resolution in the center, but also 
> slightly more distortion. Having floating elements, this version also does 
> better when used close up.
> The CFE IF version again has slightly higher resolution (which, by the way, 
> is wasted on digital sensors. They just do not see it), and considerably 
> more distortion.
> 
> 
> The are only two versions of the Biogon: the one on all SW(...) cameras from
> 
> 1954 upto and including the 903 SWC, and the one on the 905 SWC.
> The difference between these two versions is minimal, the first version 
> being very slightly better.
> 
> 
> Comparing the 40 mm to the Biogon, the Biogon 'wins'. But not by much.
> Distortion is very low (for a lens with such a wide angle of view) in the 
> Biogon's images, and none of the 40 mm versions even comes close.
> But resolution and contrast of the 38 mm is not much different, certainly 
> not when the lenses are stopped down a bit. The Biogon appears to hold up 
> performance slightly better going out of the center towards the edges and 
> corners of the image.
> 
> The difference however i not that big, i think, to be a decision maker or 
> breaker. Other considerations - like being able to use the lens on a reflex 
> camera and inspect focus visually - may be more important to you.
> 
> 
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