As for the Loony 11 rule, the moon is in full daylight but it looks odd if you expose it properly.
Indoors I used 1/60 at f/4 for Tri-X in typical 500 lux office lighting, or on stage with all the lights on as for the curtain call, unless the meter said otherwise.
I've gotten good hand-held shots as slow as 1/15 by holding the camera upside down, braced against my forehead instead of my nose. I was a student filmmaker's technician in college and had some practical experience with difficult conditions.
I did run the post photo lab, which at least had no windows, a safelight, running water and ten times the cabinet storage it needed for photo supplies. When I was alone with the lights off I tried not to imagine what might have happened in the dungeon-like cellar of a WW2 German army barracks.
Not really. I found a wide-angle in Munich and a portrait-length telephoto in Zurich, that's all. The US is MUCH better for collecting old goodies.
The lens that came with the enlarger was good enough for ordinary prints. I did publicity shots for the USO theater productions and dunking-booth target portraits of all the officers for a carnival they put on. The Colonel was the most requested and I had to print several extra batches. We troopies couldn't get into the throwing line because the officers bent it into a closed circle. We satisfied our frustrations with tickets to sledge-hammer an old car.
Leitz was trying to retire the old III series by buying them up. They were good about reconditioning mine, though, and I got to tour the Wetzlar factory.
They aren't all that valuable:
Their streets don't accommodate cars; their cars and trucks fit the narrow streets wherever we didn't initiate mandatory urban renewal. American vehicles didn't fit.
Rothenburg retained its condition because its economy declined and renovation stopped, 400 years ago. Many smaller towns looked similar, the slightly larger ones were bombed.
The road on the left is the main route through town that follows the top edge of the river valley. The right-hand one slants down to the river. I suspect the Romans might have first paved them over prehistoric footpaths.
All the buildings probably have that timber-frame (Fachwerk) construction but after the war covering it with beige or pastel stucco became the fashion. Look at the upper floors above the white bench. jsw