[LargeFormat] 7" Gundlach Radar Anastigmat Extreme W.A. 8x10 f16

[Richard Knoppow]

----- Original Message ----- 
From: "Timothy Atherton" <tim at KairosPhoto.com>
To: "f32 Large Format Photography Mail List" 
<largeformat at f32.net>
Sent: Tuesday, August 23, 2005 6:44 PM
Subject: [LargeFormat] 7" Gundlach Radar Anastigmat Extreme 
W.A. 8x10 f16


> anyone know anything about this lens - seems to cover 8x10 
> nicely with room
> for some movements
>
 Neither my old Gundlach-Manhattan catalogue of the 
_Handbook of Photography_ Henney and Duddley shows the 
construction of this lens but it is undoubtedly a copy of 
the Zeiss Protar wide angle lens. The catalogue gives the 
coverage as 90degrees but no information.
  If the focal length is marked 7 inches it is a slightly 
different lens than the ones listed in the 1927 catalogue, 
where the closest is 6-1/4 inches (for 8x10).
  You can get a very approximate date of the lens by the 
city listed on the front ring. The original Gundlach company 
was in Rochester. It was resurected in the mid or late 1930s 
in Freeport N.Y., near Rochester.
  Ernst Gundlach, the founder of this and several other 
companies, was a specialist in modifying existing lenses in 
order to avoid patent infringment. It would be interesting 
to know what the construction of this lens is. Shine a 
flashlight at the cells and count the reflections. Glass-air 
surfaces are very bright (even when coated) and cemented 
surfaces are quite dim. A W.A. Protar should have two bright 
and one dim reflection in each cell.

---
Richard Knoppow
Los Angeles, CA, USA
dickburk at ix.netcom.com