Just a short note that I expanded my article on the Docter Optic lenses (http://www.arnecroell.com/docter.pdf) with an appendix containing scans of the original Docter leaflets, by kind permission of the successor company, Docter Optics. The appendix starts at p. 19 and is 45 pages. The leaflets are (obviously) in German, but I have listed some explanations on p. 19, and MTF curves are pretty universal. It contains the MTF curves plus other data for all their Tessars, Apo-Germinars, and Apo-Germinar W lenses (not for the Germinar W, I have never seen any MTF curves for those). The appendix doubled the file size of the article to 12MB, so be patient with the download.
In the last few months I also reworked my other lens articles on that site (http://www.arnecroell.com/publications), mostly integrating tables and images into the text of the older articles, and redoing/adding "lens porn" images ;-)