this day I got the 70-300 mm lens hooked up to my camera with the D50 reversed.
And the results are very nice, but with the lens reversed the DOF is just to small. Even the sligthest movement in the flat occured that the pictures turned unsharp, so basically thats not how it works. It even got worse when somebody run up the stairs with a big box full of towels and a second box with proseco vinegar.

thank you so much mum + dad!