This other source says:
I also understand that, just to make things even more difficult, the Germans used to differentiate between photos and photo works, the latter taken spontaneously, whereas, presumably, the former were 'arranged' or planned - such as studio shots.In the case of photographs taken between 1945 and 1996:
Copyright exists for at least as long as post 1 January 1996. For a photograph taken on or after 1 June 1957 but before 1 August 1989 attract a term of protection of 50 years from the end of the calendar year in which the photograph was published, although any photographs still unpublished on 1 August 1989 are protected only until the end of 2039. These terms will continue to apply if they are longer than the terms worked out on the same basis as for photographs taken on or after 1 January 1996
For a photograph taken on of after 1 August 1989 but before 1 January 1996 and the author or all the authors are unknown, the copyright term is the longer of either 50 years from the end of the calendar year in which the photograph is first made available to the public or the term applying to photographs taken on or after 1 January 1996.
In the case of photographs taken before 1 January 1945:
For such photographs, copyright would have expired on 31 December 1994 or earlier. However, if such a photograph were protected on 1 July 1995 in another European Economic Area (EEA) state under legislation relating to copyright or related rights, copyright would have been revived from 1 January 1996 to the end of the term applying to photographs taken on or after 1 January 1996. In deciding whether a photograph was protected in another EEA state, it is, of course, the law of that state which must be interpreted and the criteria used to decide whether a photograph should receive any protection at all would need to be considered very carefully.
The state where the longest copyright protection may have existed on 1 July 1995 is Germany, which generally had a term of life plus 70 years, but it is likely that not all photographs which qualified for copyright protection in the UK would have been protected in Germany. Copyright law in a number of other EEA states could also have given a longer term of protection for a photograph than in the UK.
Where copyright in a photograph was revived on 1 January 1996, there are transitional provisions and savings for those who were exploiting or want to exploit the photograph.
Help, I'm thoroughly confused.