Just received an interesting lens that I have not seen before. It is a Goerz Double Anastigmat (Dagor) Series IV No. 8 19" f9. No. 160271. C.P. Goerz Berlin New York. It takes Waterhouse stops and does not have an iris aperture. I am familiar with the Series III Dagors but have never seen a Series IV. I'm assuming that at f9 it might be a process lens. At 19" it should easily cover 11x14 but do not know its angle of coverage. Has anyone shot with this lens and what format would best be suited for its use. Thanks for any info.