[LargeFormat] Carl Zeiss Dagor 180mm f9

[Timothy Atherton]

Thanks Richard, tons of info.

I borrowed one of a colleague for a while - it's a very very nice lens (it
was probably later rather than earlier and was in a COmpur shutter). Someone
was telling me it was a Protar III just renamed after Zeiss bought Goerz,
but I didn't think so.

tim a

> -----Original Message-----
> From: largeformat-bounces at f32.net [mailto:largeformat-bounces at f32.net]On
> Behalf Of Richard Knoppow
> Sent: September 30, 2005 9:50 PM
> To: f32 Large Format Photography Mail List
> Subject: Re: [LargeFormat] Carl Zeiss Dagor 180mm f9
>
>
>
> ----- Original Message -----
> From: "Timothy Atherton" <tim at KairosPhoto.com>
> To: "f32 Large Format Photography Mail List"
> <largeformat at f32.net>
> Sent: Friday, September 30, 2005 6:08 PM
> Subject: [LargeFormat] Carl Zeiss Dagor 180mm f9
>
>
> > Does anyone have any information on this lens at all?
> >
> > thanks
> >
> > tim a
>
>    The f/9 Wide Angle Dagor is a design by Franz Urban
> covered in USP 1,641,402 The lens was made by C.P.Goerz and
> by Zeiss after taking over Goerz. In the USA Goerz-American
> made an f/8 version of the wide angle Dagor but I don't have
> a patent number or prescription for it. The f/9 Dagor has a
> claimed coverage of 100 degrees. This is not much more than
> the 87 degrees claimed for the f/6.8 standard Dagor but the
> corrections at the outer parts of the image are probably
> better. The lens has a very good reputation. Other than its
> speed and maximum coverage its characteristics will be about
> the same as a regular Dagor although for similar focal
> lengths it probably has less zonal spherical aberration
> because of the slower speed.
>    The German versions of this lens seem much rarer than the
> f/8 American version. I have no idea of its value other than
> condition is everything in a lens. While modern wide angle
> lenses have the advantage of more advanced design types
> allowing higher speed for a given angle and wider maximum
> angles they tend to be large and heavy. Older types like the
> W.A.Dagor and W.A.Protar offer the advantage of very good
> performance in a much smaller and lighter package.
>
> ---
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk at ix.netcom.com
>
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