Came across this old thread and for the heck of it I googled Hauptarchiv der NSDAP, München.
That translates to:
Central Archive of the NSDAP, Munich (Germany)
Well, it turns out this was an actual organization that was responsible for documenting the party (NSDAP), so it would make sense that they would have camera equipment. The NSADP aka Nazi Party was founded in Munich, so that fits.
The serial number checks out for 1935 / 236 001 - 284 600, which places it within the correct time period.
This is what my google search found:
https://portal.ehri-project.eu/units/de-002429-ns_26
Biographical History
1934 in München eingerichtet zur Dokumentation der Geschichte der NSDAP und der angeschlossenen Gliederungen sowie deren Vorläufer in der Völkischen Bewegung unter Übernahme der Materialsammlung der Reichspropagandaleitung und des ebenfalls dort eingegliederten Pressearchivs der NSDAP. Als Auskunftsstelle für alle Partei- und staatlichen Dienststellen wurden neben Bibliotheksbeständen, Zeitschriften- und Bildsammlungen Akten von Parteiorganen und Behörden verwahrt, sowie Erlebnisberichte, private Sammlungen, Schrift- und Druckgut aufgelöster und verbotener Parteien und Organisationen.
1929 war von der NSDAP die Sammlung Rehse als Archiv für Zeitgeschichte und Publizistik erworben worden. Diese war als Parteidienststelle dem Reichsschatzmeister unterstellt und bestand unabhängig vom Hauptarchiv als parteioffiziöses Archiv.
I'm too tired to translate by hand, so here is the Google translate, which is pretty accurate:
Biographical History
1934 in Munich furnished for the documentation of the history of the NSDAP and the affiliated divisions as well as their predecessors in the Völkisch movement under assumption of the material collection of the Reichspropagatteneitung and the likewise incorporated there press archive of the NSDAP. As an information point for all party and state departments, library files, magazine and picture collections were kept by party organs and authorities, as well as experience reports, private collections, written and printed material of disbanded and banned parties and organizations.
In 1929, the NSDAP had acquired the Rehse Collection as an archive for contemporary history and journalism. This was subordinated to the Reich treasurer as a party service and existed independently of the main archive as party-official archive.
Is it real? I have no idea. The organization existed and the serial number dates it to the correct period.
But it would be an oddball forgery. Usually it's Wehrmacht, Luftwaffe, Heer, Kriegsmarine, SS etc. that gets forged.
I'm a bit of a WW2 buff and never even heard of this organization, but considering how obsessed the Nazis were with documenting everything it makes total sense that something like it would have existed. And of course an organization like this would have need camera equipment.
Anyone?