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Re: Air recce photos.
I have seen quite a few of both, but probably never f35/28,000 side-by-side for a reasonably accurate apples-to-apples comparison. What I have seen left me with the impression that the German resolution was not noticeably better than the Allied photos.
The book noted below gets into the photography aspect of the subject in considerable detail, as I recall, and can probably answer your questions concerning focal lengths, altitude and resolution of the prints. It has several illustrated chapters on the cameras used and the settings.
Wadman, David, John Bradley and Barry Ketley. Aufklärer: Luftwaffe Reconnaissance Aircraft & Units 1935-1945. Aldershot (Hants): Hikoki Publications, 1997. ISBN: 0 9519899 8 7. Hb (oversize). Dj. 272p. Pictorial with accompanying text. Dwgs. (incl. color profiles). Map(s). Tables. Charts. Glossary. Bibliography.
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