Suter Anastigmat serie I

[jumanji]

I've received a Suter Anastigmat serie I no 6, 400mm f-seem-to-be-8. Vade Mecum said that it was Dagor clone, but I doubt that, since the rear cell is larger than the front, and two cells are thinner while distance between them is longer than Goerz Dagor. Anyone have more info?

[Steven Tribe]

There is quite an extensive previous thread which mentions it as a 4 + 4 and F6.8, but the larger ones may be slower like a number of other lens types (including the Dagor - F7.7).

[jumanji]

4+4 so it is'nt a Dagor?

[Steven Tribe]

The earlier threads suggest that the 4th lens was an attempt to circumvent Goerz's patent as it appeared in the late 1890's when Goerz still could have complained! Patent/Registered design periods were very short at the time. So soon afterwards there were dozens of Dagor copies made by others.

[jumanji]

Thank you Steven.