Balder -
Thanks for the welcome to the sick bay 
.
I spent most of last Sunday cleaning these two guns, and every time I think they are clean, I see rust in places I missed when viewing hi resolution close-up photos on the computer. I finally figured out the direct sunlight was not the best option, and moved under a shaded covered patio with the sun at midday elevation for picture taking.
Later I tried using the wireless feature with the SB-800 Nikon flashgun with a diffuser, holding the flash at various positions - separated from the camera. That method did not yield any results worth bragging about.
Eventually I did as you suggested, and backed away from the gun using the Nikkor AF-S DX VR Zoom 18-200mm lens. As you pointed out, with file sizes of over 3 MB there is plenty of information from which to crop and select what we need.
Also glad to see a Luger older than mine. It is truly amazing to see these guns that are nearly 100 years old in such good condition - and in fine working order.
I am wondering if my magazine tool has the appropriate marking to go with this gun, or does the marking simply imply that the tool is not an aftermarket item?
Gary -