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View Full Version : Are all Goerz Double Anastigmats Dagors?



Dan Fromm
30-Jan-2017, 11:56
Some people think so. See http://web.archive.org/web/20170130185207/http://www.ebay.com/itm/Goerz-Double-Anastigmat-Lens-TYPE-B-Focus-4-3-4-w-ZEISS-Cover-No-Reserve-/381940550573

I looked up the patent. The lens offered is a dialyte type. The VM says that the Goerz Type B double anastigmat's trade name is Celor.

Re the seller, there's one born every minute.

Steven Tribe
30-Jan-2017, 12:50
He doesn't actually say it is a Dagor - just quotes an intersearch which mentions the series iii and series iv which are normal dagors and wide-angled dagors. He is faithful in giving the actual rim engraving.

Dan Fromm
30-Jan-2017, 13:16
He doesn't actually say it is a Dagor - just quotes an intersearch which mentions the series iii and series iv which are normal dagors and wide-angled dagors. He is faithful in giving the actual rim engraving.

He strongly hinted that it is a Dagor. If you'd read the listing to the bottom you'd have seen:


----- Some info I found on the web:

Goerz Double Anastigmat was designed by von Höegh and introduced in 1892, from 1904 it was known as the Dagor. It proved very successful and was widely copied. The series III is a general purpose lens working at f6.8 in the shorter lengths and f7.7 in longer lengths. Available in sizes of 1 ⅝ - 35" (in the UK in 1900). The series IV was a modified design for copying and architectural use, working at f11 it was introduced in sizes up to 47".

A wink's as good as a nod.

Xipho
3-Feb-2017, 12:55
The Dagor is certainly a Dagor type, but Celor and Syntor are 4/4 DA, as the later Dogmar!

The very first DAGORs "Doppel Anastigmat GOeRz" were only called Doppelanastigmat Goerz...

The Series III DA is a Dagor!